Scientific Commons: G. Heger

A displacive, 2nd order structural phase transition at Ts=395 K from space group I`4 2 m below Ts to I 4/m c m above Ts has been discovered in the two-dimensional spin dimer compound SrCu2(BO3)2. The...

Pressure dependence of the crystal structure of CuGeO§3 to 6.2 GPa by neutron diffraction. (2000)

Braden, M., Büchner, B., Klotz, S., Marshall, W.G., Behruzi, M., Heger, G.

Physical Review B, 60(1999) S.9616-22

Structural aspects of inorganic spin peierls compounds. (1998)

Braden, M., Heger, G., Hennion, B., Reichardt, W., Dhalenne, G., Revcolevschi, A.

18th European Crystallographic Meeting (ECM'98), Prague, CZ, August 15-18, 1998

Anharmonic structural behavior in CuGeO§3. (1998)

Braden, M., Ressouche, E., Büchner, B., Kessler, R., Heger, G., Dhalenne, G., ...

Physical Review B, 57(1998) S.11497-503

Study of the structural phase transition in Gd§2§-§xCe§xCuO§4. (1997)

Vigoureux, P., Braden, M., Gukasov, A., Paulus, W., Bourges, P., Cousson, A., ...

Physica C, 273(1997) S.239-47

Beziehung zwischen Kristallstruktur und magnetischer Wechselwirkung in CuGeO§3. (1996)

Braden, M., Wilkendorf, G., Lorenzana, J., Ain, M., Mc Intyre, G.J., Behruzi, M., ...

4.Jahrestagung der Deutschen Gesellschaft für Kristallographie, Marburg, 11.-14.März 1996

Structural analysis of CuGeO§3: Relation between nuclear structure and magnetic interaction. (1996)

Braden, M., Wilkendorf, G., Lorenzana, J., Ain, M., Mc Intyre, G.J., Behruzi, M., ...

Physical Review B, 54(1996) S.1105-16

Structural Study of TlH2PO4 and TlD2PO4 in the High Temperature Phase (1995)

Rios, S., Paulus, W., Cousson, A., Quilichini, M., Heger, G., Le Calvé, N., ...

The crystal structures of both TlH2PO4 and its deuterated form TlD2PO4 have been studied at 373 K using single-crystal neutron diffraction. Data were collected on a four-circle diffractometer at...

Structural Study of TlH2PO4 and TlD2PO4 in the High Temperature Phase (1995)

Rios, S., Paulus, W., Cousson, A., Quilichini, M., Heger, G., Le Calvé, N., ...

The crystal structures of both TlH2PO4 and its deuterated form TlD2PO4 have been studied at 373 K using single-crystal neutron diffraction. Data were collected on a four-circle diffractometer at...

Structural Study of TlH2PO4 and TlD2PO4 in the High Temperature Phase (1995)

Rios, S., Paulus, W., Cousson, A., Quilichini, M., Heger, G., Le Calvé, N., ...

The crystal structures of both TlH2PO4 and its deuterated form TlD2PO4 have been studied at 373 K using single-crystal neutron diffraction. Data were collected on a four-circle diffractometer at...

A study on the structural distortion of the T'phase. (1995)

Braden, M., Adelmann, P., Paulus, W., Vigoureux, P., Andre, G., Schweiss, P., ...

Proc.of the 4th Internat.Conf.on Materials and Mechanisms of Superconductivity and High Temperature Superconductors, Grenoble, F, July 4-9, 1994

A systematic neutron diffraction study of RE§2CuO§4§-§d§e§l§t§a (RE=Pr,Nd,Eu). (1995)

Vigoureux, P., Paulus, W., Braden, M., Cousson, A., Heger, G., Henry, J.Y., ...

Proc.of the 4th Internat.Conf.on Materials and Mechanisms of Superconductivity and High Temperature Superconductors, Grenoble, F, July 4-9, 1994

Symmetry breaking and structural changes at the neutral-to-ionic transition in tetrathiafulvalene-p-chloranil. (1995)

Le Cointe, M., Lemee-Cailleau, M.H., Cailleau, H., Toudic, B., Toupet, L., Heger, G., ...

Physical Review B, 51(1995) S.3374-86

Proton density and orientational potential in nickelhexammine salts: a thermodynamic analysis of rotation-translation coupling. (1995)

Schiebel, P., Hoser, A., Prandl, W., Heger, G., Paulus, W., Schweiss, P.

Journal of Physics: Condensed Matter, 6(1994) S.10989-11005

Evidence for a pronounced local order in the high temperature phase of C§6§0. (1995)

Pintschovius, L., Chaplot, S.L., Roth, G., Heger, G.

Kuzmany, H. [Hrsg.]

Evidence for a pronounced local orientational order in the high temperature phase of C§6§0. (1995)

Pintschovius, L., Chaplot, S.L., Roth, G., Heger, G.

Physical Review Letters, 75(1995) S.2843-46

Report on the expert workshop "Supporting Industrial Research and Development through Information and Documentation Techniques: Current Practices and Services": Ljubljana, February 24-25, 1994 (1994)

Gundrum, U., Heger, G.

Report on the expert workshop "Innovation Management" (1994)

Gundrum, U., Heger, G.

Report on the expert workshop "Innovation Financing": Ljubljana, September 29-30, 1994 (1994)

Heger, G., Walter, G.H.

Innovation supporting services by information agencies (1994)

Heger, G.

Static and dynamic displacements in RBa§2Cu§3O§7§-§d§e§l§t§a (R=Y,Ho; delta=0.05,0.5): A neutron-diffraction study on single crystals. (1994)

Schweiss, P., Reichardt, W., Braden, M., Collin, G., Heger, G., Claus, H., ...

Physical Review B, 49(1994) S.1387-96

Orientational order and electron density of C§6§0 at room temperature studied by combined neutron and X-ray diffraction on single crystals. (1994)

Papoular, R.J., Roth, G., Heger, G., Haluska, M., Kuzmany, H.

Kuzmany, H. [Hrsg.]

Structural analysis of Gd§2CuO§4: a new modification of the T'phase. (1994)

Vigoureux, P., Paulus, W., Braden, M., Cousson, A., Lauriat, J.P., Gukasov, A., ...

15th European Crystallographic Meeting, Dresden, August 28 - September 2, 1994

Relation between structure and doping in La§2§-§xSr§xCuO§4§+§d§e§l§t§a. A neutron diffraction study on single crystals. (1994)

Braden, M., Schweiss, P., Heger, G., Reichardt, W., Fisk, Z., Gamayunov, K., ...

Physica C, 223(1994) S.396-416

Neutron diffraction study of 1,2,3-trichlorobenzene-d§3. (1994)

Groke, D., Heger, G., Schweiss, B.P., Weiss, A.

Zeitschrift für Naturforschung a, 49(1994) S.599-610

Elastic and inelastic neutron scattering studies on the tetragonal to orthorombic phase transition of La§2§-§xSr§xCuO§4§+§-§d§e§l§t§a. (1994)

Braden, M., Schnelle, W., Schwarz, W., Pyka, N., Heger, G., Fisk, Z., ...

Zeitschrift für Physik B, 94(1994) S.29-37

Orientational disorder in Ni(NH3)6I2. Evidence for rotation-translation coupling (1993)

Schiebel, P., Hoser, A., Prandl, W., Heger, G., Schweiss, P.

Patterson and Fourier analysis of neutron diffraction data of cubic Ni(HN3)6I2 taken at T = 295 K and T = 35 K show a planar proton density distribution with four maxima at the corners of a square....

Atomic structure of the Al-Pd-Mn icosahedral phase (1993)

Boudard, M, De Boissieu, M, Janot, C, Heger, G, Beeli, C, Nissen, HU, ...

Orientational disorder in Ni(NH3)6I2. Evidence for rotation-translation coupling (1993)

Schiebel, P., Hoser, A., Prandl, W., Heger, G., Schweiss, P.

Patterson and Fourier analysis of neutron diffraction data of cubic Ni(HN3)6I2 taken at T = 295 K and T = 35 K show a planar proton density distribution with four maxima at the corners of a square....

Orientational disorder in Ni(NH3)6I2. Evidence for rotation-translation coupling (1993)

Schiebel, P., Hoser, A., Prandl, W., Heger, G., Schweiss, P.

Patterson and Fourier analysis of neutron diffraction data of cubic Ni(HN3)6I2 taken at T = 295 K and T = 35 K show a planar proton density distribution with four maxima at the corners of a square....

Relation between structure and doping in La§2§-§xSr§xCuO§4§+§d§e§l§t§a. An elastic neutron diffraction study. (1993)

Braden, M., Schweiss, P., Heger, G., Reichardt, W., Fisk, Z., Gamayunov, K., ...

13th General Conf.of the Condensed Matter Division of the European Physical Society in Conjunction with Arbeitskreis Festkoerperphysik Deutsche Physikalische Gesellschaft, Regensburg, March 29 -...

Orientational disorder in Ni(NH§3)§6I§2: evidence for rotation-translation coupling. (1993)

Schiebel, P., Hoser, A., Prandl, W., Heger, G., Schweiss, P.

Journal de Physique I, 3(1993) S.987-1006

Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal (1992)

Quilichini, M., Hennion, B., Heger, G., Lefebvre, S., Quivy, A.

Dynamical properties of quasiperiodic structures are rather tricky and far from being understood. For quasicrystals only little information is available both theoretically and experimentally. In this...

Neutron and X-ray single crystal study of the AlPdMn Icosahedral phase (1992)

Bouchard, M, De Boissieu, M, Janot, C, Heger, G, Beeli, C, Nissen, H-U, ...

Flexible Steuerung von Montagesystemen. Auskunfts- und Informationssysteme zur JIT-Auftragsabwicklung für die flexible Montage (1992)

Bühring, J., Heger, G., Kaiser, L.

Die Wettbewerbsfähigkeit von Unternehmen hängt zunehmend davon ab, ob sie ihre Produkte ausreichend schnell, flexibel und kostengünstig anbieten können. Die zunehmende Kunden- und...

Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal (1992)

Quilichini, M., Hennion, B., Heger, G., Lefebvre, S., Quivy, A.

Dynamical properties of quasiperiodic structures are rather tricky and far from being understood. For quasicrystals only little information is available both theoretically and experimentally. In this...

Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal (1992)

Quilichini, M., Hennion, B., Heger, G., Lefebvre, S., Quivy, A.

Dynamical properties of quasiperiodic structures are rather tricky and far from being understood. For quasicrystals only little information is available both theoretically and experimentally. In this...

Structural analyses on La§2§-§xSr§xCuO§4§-§d§e§l§t§a crystals. (1992)

Braden, M., Schweiss, P., Heger, G., Schwarz, W., Wohlleben, D., Fisk, Z., ...

Proc.of the 3rd Internat.Conf.on Materials and Mechanisms of Superconductivity High-Temperature Superconductors (M2S-HTSC), Kanazawa, J, July 22 - 26, 1991 Part I

Characterization and structural analysis of twinned La§2§-§xSr§xCuO§4§+§-§d§e§l§t§a crystals by neutron diffraction. (1992)

Braden, M., Heger, G., Schweiss, P., Fisk, Z., Gamayunov, K., Tanaka, I., ...

Physica C, 191(1992) S.455-68

On phase transitions in NH§4HSeO§4 and ND§4DSeO§4. (1992)

Dvorak, V., Quilichini, M., Le Calve, N., Pasquier, B., Heger, G., Schweiss, P.

Journal de Physique I, 1(1991) S.1481-98

On phase transitions in NH4HSeO4 and ND4DSeO4 (1991)

Quilichini, M., Le Calvé, N., Pasquier, B., Heger, G., Schweiss, P.

We propose a hypothetical prototype phase (space group Imm) from which all observed phases in NH4HSeO4 and ND4DSeO4 can be deduced by introducing order parameters of definite symmetries. Following...

The crystal structure of RESr2GaCu2O7 (1991)

Roth, G., Adelmann, P., Heger, G., Knitter, R., Wolf, Th.

The crystal structure of RESr2GaCu2O7 (with RE=Er...La and Y) has been studied by powder neutron, powder X-ray and single crystal X-ray diffraction. These compounds crystallize in space group Ima2...

On phase transitions in NH4HSeO4 and ND4DSeO4 (1991)

Quilichini, M., Le Calvé, N., Pasquier, B., Heger, G., Schweiss, P.

We propose a hypothetical prototype phase (space group Imm) from which all observed phases in NH4HSeO4 and ND4DSeO4 can be deduced by introducing order parameters of definite symmetries. Following...

The crystal structure of RESr2GaCu2O7 (1991)

Roth, G., Adelmann, P., Heger, G., Knitter, R., Wolf, Th.

The crystal structure of RESr2GaCu2O7 (with RE=Er...La and Y) has been studied by powder neutron, powder X-ray and single crystal X-ray diffraction. These compounds crystallize in space group Ima2...

On phase transitions in NH4HSeO4 and ND4DSeO4 (1991)

Quilichini, M., Le Calvé, N., Pasquier, B., Heger, G., Schweiss, P.

We propose a hypothetical prototype phase (space group Imm) from which all observed phases in NH4HSeO4 and ND4DSeO4 can be deduced by introducing order parameters of definite symmetries. Following...

The crystal structure of RESr2GaCu2O7 (1991)

Roth, G., Adelmann, P., Heger, G., Knitter, R., Wolf, Th.

The crystal structure of RESr2GaCu2O7 (with RE=Er...La and Y) has been studied by powder neutron, powder X-ray and single crystal X-ray diffraction. These compounds crystallize in space group Ima2...

SESr§2GaCu§2O§7 (SE: La...Er;Y) - Eine neue Variante des 1-2-3 Strukturtyps. (1991)

Roth, G., Adelmann, P., Heger, G., Knitter, R., Wolf, T.

1.Gemeinsame Tagung der Arbeitsgemeinschaft Kristallographie und der Vereinigung fuer Kristallographie, Muenchen, 10.-13.Maerz 1991

Strukturuntersuchungen an La§2§-§xSr§x- CuO§4§-§d§e§l§t§a-Einkristallen. (1991)

Braden, M., Schweiss, P., Heger, G.

55.Physikertagung und Fruehjahrstagung des Arbeitskreises Festkoerperphysik der DPG gemeinsam mit der Nederlandse Natuurkundige Vereniging -Dynamik und Statistische Physik- und dem Fachbereich Physik...

The crystal structure of RESr§2GaCu§2O§7. (1991)

Roth, G., Adelmann, P., Heger, G., Knitter, R., Wolf, T.

Journal de Physique I, 1(1991) S.721-41

Light-induced structural changes in sodiumnitroprusside (Na§2(Fe(CN)§5NO) 2D§2§2O) at 80 K. (1991)

Ruedlinger, M., Schefer, J., Chevrier, G., Furer, N., Guedel, H.U., Haussuehl, S., ...

Zeitschrift fuer Physik B, 83(1991) S.125-30

Structural properties of high T§c superconductors. (1991)

Heger, G., Braden, M., Schweiss, P., Roth, G., Hervieu, M.

Phase Transitions, 30(1991) S.135-38

Neutron diffraction analysis of barium nitroprusside trihydrate at room temperature. (1991)

Navaza, A., Schweiss, P., Alzari, P.M., Chevrier, G., Heger, G., Guida, J.A.

Journal of Solid State Chemistry, 89(1990) S.23-30

Inelastic neutron scattering study of acoustic modes in a monodomain AlCuFe quasicrystal (1990)

Quilichini, M., Heger, G., Hennion, B., Lefebvre, S., Quivy, A.

Inelastic neutron scattering results evidenced for the first time that acoustic phonon modes can be observed for a quasicrystal. The triple-axes experiments have been performed on a small monodomain...

X-ray and TEM studies of Al-Fe-Cu dodecahedral particles : characterization of their microcrystalline state of pseudo-icosahedral symmetry (1990)

Dénoyer, F., Heger, G., Lambert, M., Audier, M., Guyot, P.

Dodecahedral particles of Al-Fe-Cu alloy, obtained by slow solidification, have been studied by X-ray diffraction and transmission electron microscopy. Their peculiar microcrystalline structure of...

Inelastic neutron scattering study of acoustic modes in a monodomain AlCuFe quasicrystal (1990)

Quilichini, M., Heger, G., Hennion, B., Lefebvre, S., Quivy, A.

Inelastic neutron scattering results evidenced for the first time that acoustic phonon modes can be observed for a quasicrystal. The triple-axes experiments have been performed on a small monodomain...

X-ray and TEM studies of Al-Fe-Cu dodecahedral particles : characterization of their microcrystalline state of pseudo-icosahedral symmetry (1990)

Dénoyer, F., Heger, G., Lambert, M., Audier, M., Guyot, P.

Dodecahedral particles of Al-Fe-Cu alloy, obtained by slow solidification, have been studied by X-ray diffraction and transmission electron microscopy. Their peculiar microcrystalline structure of...

Inelastic neutron scattering study of acoustic modes in a monodomain AlCuFe quasicrystal (1990)

Quilichini, M., Heger, G., Hennion, B., Lefebvre, S., Quivy, A.

Inelastic neutron scattering results evidenced for the first time that acoustic phonon modes can be observed for a quasicrystal. The triple-axes experiments have been performed on a small monodomain...

X-ray and TEM studies of Al-Fe-Cu dodecahedral particles : characterization of their microcrystalline state of pseudo-icosahedral symmetry (1990)

Dénoyer, F., Heger, G., Lambert, M., Audier, M., Guyot, P.

Dodecahedral particles of Al-Fe-Cu alloy, obtained by slow solidification, have been studied by X-ray diffraction and transmission electron microscopy. Their peculiar microcrystalline structure of...

Strukturuntersuchungen an La§2§-§xSr§xCuO§4-Einkristallen. (1990)

Braden, M., Schweiss, P., Heger, G.

Fruehjahrstagung DPG, Festkoerperphysik, Duenne Schichten, Dynamik und Statistische Physik, Halbleiterphysik, Magnetismus, Metallphysik, Oberflaechenphysik, Tiefe Temperaturen, Vakuumtechnik,...

Structural analyses of twinned La§2§-§xSr§xCuO§4 crystals. (1990)

Braden, M., Schweiss, P., Roth, G., Heger, G.

Internat.Conf. Advanced Methods in X-ray and Neutron Structure Analysis of Materials, Praha, CS, August 22-24, 1990

Crystal structure and specific heat of YBa§2(Cu§1§-§xZn§x)§3O§7§-§d§e§l§t§a (x=0.01...0.1, delta=0;0.9). (1989)

Roth, G., Adelmann, P., Ahrens, R., Blank, B., Buerkle, H., Gompf, F., ...

Proc.of the Internat.Conf.on Materials and Mechanisms of Superconductivity High-Temperature Superconductors (M2S-HTSC), Stanford, Calif., July 23 - 28, 1989 Part I

Orientational disorder in the high temperature phase of KCIO4 (1988)

Denise, B., Debeau, M., Depondt, Ph., Heger, G.

Neutron diffraction experiments have been performed on a single crystal of the high-temperature phase of KClO4 at 325 °C and 420 °C. The analysis of the structure factor of Bragg reflections leads...

STRUCTURAL AND MAGNETIC INVESTIGATIONS ON (Mn, Co)-OLIVINES (1988)

Untersteller, E., Treutmann, W., Hellner, E., Schweiss, P., Heger, G., Hosoya, S.

Magnetization measurements and neutron diffraction experiments on single crystals of α-Mn1.07Co0.93SiO4 and α-Mn1.66Co0.34SiO4 show an antiferromagnetic order similar to that of...

Orientational disorder in the high temperature phase of KCIO4 (1988)

Denise, B., Debeau, M., Depondt, Ph., Heger, G.

Neutron diffraction experiments have been performed on a single crystal of the high-temperature phase of KClO4 at 325 °C and 420 °C. The analysis of the structure factor of Bragg reflections leads...

STRUCTURAL AND MAGNETIC INVESTIGATIONS ON (Mn, Co)-OLIVINES (1988)

Untersteller, E., Treutmann, W., Hellner, E., Schweiss, P., Heger, G., Hosoya, S.

Magnetization measurements and neutron diffraction experiments on single crystals of α-Mn1.07Co0.93SiO4 and α-Mn1.66Co0.34SiO4 show an antiferromagnetic order similar to that of...

Orientational disorder in the high temperature phase of KCIO4 (1988)

Denise, B., Debeau, M., Depondt, Ph., Heger, G.

Neutron diffraction experiments have been performed on a single crystal of the high-temperature phase of KClO4 at 325 °C and 420 °C. The analysis of the structure factor of Bragg reflections leads...

STRUCTURAL AND MAGNETIC INVESTIGATIONS ON (Mn, Co)-OLIVINES (1988)

Untersteller, E., Treutmann, W., Hellner, E., Schweiss, P., Heger, G., Hosoya, S.

Magnetization measurements and neutron diffraction experiments on single crystals of α-Mn1.07Co0.93SiO4 and α-Mn1.66Co0.34SiO4 show an antiferromagnetic order similar to that of...

Roentgen-, Neutronen- und Elektronen-Beugungsuntersuchungen an hoch-T§c Supraleitern: Kristallstruktur und Realbau. (1988)

Heger, G.

52.Physikertagung gemeinsam mit der Fruehjahrstagung DPG, Duenne Schichten, Dynamik und Statistische Physik, Halbleiterphysik, Magnetismus, Metallphysik, Oberflaechenphysik, Tiefe Temperaturen,...

On the microstructure of High-T§c superconductors. (1988)

Heger, G.

Symp.High Temperature Superconductors, Structure and Microstructure, Bad Nauheim, April 21-22, 1988

Roentgen-, Neutronen- und Elektronenbeugungs- untersuchungen an YBa§2Cu§3O§7§-§x(x=0...1). (1988)

Roth, G., Renker, B., Schweiss, P., Heger, G., Hervieu, M., Raveau, B.

27.Diskussionstagung der AG Kristallographie, Konstanz, 28.-30.Maerz 1988

Crystallographic study of the tetragonal high-T§c superconductor YBa§2(CuO§0§.§9§5Fe§0§.§0§5)§3O§7. (1988)

Roth, G., Heger, G., Renker, B., Pannetier, J., Caignaert, V., Hervieu, M., ...

Proc.of the Internat.Conf.on High-Temperature Superconductors and Materials and Mechanisms of Superconductivity, Interlaken, CH, February 29 - March 4, 1988

X-ray, neutron and electron diffraction studies on YBa§2Cu§3O§7§-§x (x=0...1). (1988)

Roth, G., Heger, G., Renker, B., Pannetier, J., Caignaert, V., Hervieu, M., ...

Symp.High Temperature Superconductors, Structure and Microstructure, Bad Nauheim, April 21-22, 1988

Structural and magnetic investigations on (Mn,Co)-olivines. (1988)

Untersteller, E., Treutmann, W., Hellner, E., Schweiss, P., Heger, G., Hosoya, S.

Internat.Conf.on Magnetism (ICM 88), Paris, F, July 25-29, 1988

Orientational disorder in the high temperature phase of KClO§4. (1988)

Denise, B., Debeau, M., Depondt, Ph., Heger, G.

Journal de Physique, 49(1988) S.1203-10

Neutron diffraction investigation of strontianite, SrCO§3. (1988)

Jarosch, D., Heger, G.

Bulletin de Mineralogie, 111(1988) S.139-42

Crystallographic study of tetragonal, superconducting YBa§2(Cu§0§.§9§3Fe§0§.§0§5)§3O§7. (1988)

Roth, G., Heger, G., Renker, B., Pannetier, J., Caignaert, V., Hervieu, M., ...

Zeitschrift fuer Physik B, 71(1988) S.43-52

Copper deficiency in YBa§2Cu§3O§7§-§d§e§l§t§a. (1988)

Roth, G., Heger, G., Schweiss, P., Renker, B., Assmus, W., Kowalewski, J., ...

Physica C, 152(1988) S.329-34

X-ray diffraction study on uniformly oriented quasicrystals (1987)

Dénoyer, F., Heger, G., Lambert, M., Lang, J.M., Sainfort, P.

X-ray diffraction results on several uniformly oriented quasicrystals of an Al-Li-Cu alloy are reported. By means of long exposed monochromatic Laue and precession photographs, we confirm the parity...

X-ray diffraction study on uniformly oriented quasicrystals (1987)

Dénoyer, F., Heger, G., Lambert, M., Lang, J.M., Sainfort, P.

X-ray diffraction results on several uniformly oriented quasicrystals of an Al-Li-Cu alloy are reported. By means of long exposed monochromatic Laue and precession photographs, we confirm the parity...

X-ray diffraction study on uniformly oriented quasicrystals (1987)

Dénoyer, F., Heger, G., Lambert, M., Lang, J.M., Sainfort, P.

X-ray diffraction results on several uniformly oriented quasicrystals of an Al-Li-Cu alloy are reported. By means of long exposed monochromatic Laue and precession photographs, we confirm the parity...

Problemloesungen in der Strukturanalyse durch Kombination von Roentgen- und Neutronenbeugung. (1987)

Heger, G.

Vortr.: Universitaet Bayreuth, 4.Dezember 1986

Diffraction des rayons X par un mono-quasicristal AlLiCu. (1987)

Denoyer, F., Heger, G., Lambert, M., Lang, J.M.

Compte Rendu a l'Academie des Sciences Francaises, 304(1987) Ser.II, S.625-27

Single-crystal time-of-flight neutron diffraction of Cr§3Si and MnF§2: comparison with monochromatic-beam techniques. (1987)

Jauch, W., Schultz, A.J., Heger, G.

Journal of Applied Crystallography, 20(1987) S.117-19

Phase transformation and microtwinning in crystals of the high-T§c superconductor YBa§2Cu§3O§8§-§x, x=1.0. (1987)

Roth, G., Ewert, D., Heger, G., Hervieu, M., Michel, C., Raveau, B., ...

Materials Research Society (MRS) Europe, Conf., Strasbourg, F, June 2-5, 1987

Roentgenuntersuchungen an einheitlich orientierten Quasi-Kristallen. (1987)

Heger, G.

Vortr.: Jubilaeumsveranstaltung, 100 Jahre Fa. STOE+CIE. GmbH, Darmstadt, 12.Juni 1987

Kristallstruktur und Realbau von YBa§2Cu§3O§y (y=6,7). (1987)

Roth, G., Heger, G.

Hochtemperatur-Supraleiter und Kristallchemie, Workshop, Bad Honnef, 7.-9.Juli 1987

The orientation of the rotational potential in the crystal frame: (NH§4)§2PtCl§6. (1987)

Hoser, A., Prandl, W., Heger, G.

Heidemann, A. [Hrsg.]

Kristallstruktur und Realbau von Hoch-T§c-Supraleitern. (1987)

Roth, G., Heger, G.

KfK-Nachrichten, 19(1987) S.147-50

Twins and oriented domains in the orthorhombic superconductor YBa§2Cu§3O§7+-epsilon. (1987)

Hervieu, M., Domenges, B., Michel, C., Heger, G., Provost, J., Raveau, B.

Physical Review B, 36(1987) S.3920-22

X-ray diffraction study on uniformly oriented quasicrystals. (1987)

Denoyer, F., Heger, G., Lambert, M., Lang, J.M., Sainfort, P.

Journal de Physique, 48(1987) S.1357-61

On the structure of non-superconducting YBa§2Cu§3O§6§+§e§p§s§i§l§o§n. (1987)

Roth, G., Renker, B., Heger, G., Hervieu, M., Domenges, B., Raveau, B.

Zeitschrift fuer Physik B, 69(1987) S.53-59

Bestimmung der Kationenverteilung an einem synthetischen (Mg,Fe)-Olivin mittels Neutronenbeugung. (1986)

Untersteller, E., Hellner, E., Heger, G., Sasaki, S., Hosoya, S.

Diskussionstagung der AG Kristallographie, Giessen, 10.-12.Maerz 1986

Structure refinement of lead nitrate. (1986)

Nowotny, H., Heger, G.

Acta Crystallographica C, 42(1986) S.133-35

Neutron study of the normal high temperature phase of K§2ZnCl§4. (1986)

Quilichini, M., Heger, G.

10th European Crystallographic Meeting, Wroclaw, PL, August 5-9, 1986

Neutron diffraction refinement of the crystal structure of aragonite. (1986)

Jarosch, D., Heger, G.

TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 35(1986) S.127-31

Combinaison de la diffraction de rayons X avec la diffraction de neutrons. (1986)

Heger, G.

Vortr.: Univ.Orsay, Paris, F, 6.Okrober 1986

Neutronenpulveruntersuchungen an den Germanat-Leuziten KAlGe§2O§6, KGaGe§2O§6 und CsAlGe§2O§6. (1986)

Ohms-Bredemann, U., Pentinghaus, H., Heger, G.

Diskussionstagung der AG Kristallographie, Giessen, 10.-12.Maerz 1986

Magnetic properties of Rb§2Mn§xCr§1§-§xCl§4. (1986)

Grieb, Th., Wacker, K., Naumann, E., Treutmann, W., Heger, G., Geick, R.

physica status solidi b, 136(1986) S.585-91

Etude des transitions de phases dans le systeme Perovskite K(Mn,Zn)F§3 par diffusion elastique et inelastique des neutrons. (1985)

Heger, G.

Vortr.: Universitaet Paris VI, F, 11.Juli 1985

Crystal structure and charge density of 4-methylpyridine (C§6H§7N) at 120 K. (1985)

Ohms, U., Guth, H., Treutmann, W., Dannoehl, H., Schweig, A., Heger, G.

Journal of Chemical Physics, 83(1985) S.273-79

A versatile high-temperature furnace for neutron four-circle diffractometers (1984)

Heger, G., Kuhs, W.F., Massing, S.

The design and performance of a versatile closed, light (0,9 kg), high temperature furnace adapted to the needs of a neutron four-circle diffractometer is reported. It operates between 330 and 1 200...

A versatile high-temperature furnace for neutron four-circle diffractometers (1984)

Heger, G., Kuhs, W.F., Massing, S.

The design and performance of a versatile closed, light (0,9 kg), high temperature furnace adapted to the needs of a neutron four-circle diffractometer is reported. It operates between 330 and 1 200...

A versatile high-temperature furnace for neutron four-circle diffractometers (1984)

Heger, G., Kuhs, W.F., Massing, S.

The design and performance of a versatile closed, light (0,9 kg), high temperature furnace adapted to the needs of a neutron four-circle diffractometer is reported. It operates between 330 and 1 200...

Li-diffusion and lattice relaxation in the 1-d superionic conductor beta-eucryptite (LiAlSiO§4). (1984)

Renker, B., Bernotat, H., Heger, G., Lehner, N., Press, W.

Proc.of the 4th Internat.Conf.on Solid State Ionics, Grenoble, F, July 4-8, 1983. Part II.

Neutron and #g-diffraction on the sanidine from Volkesfeld / Eifel. (1984)

Gering, E., Heger, G., Kuhs, W., Schneider, J.R.

13th General Assembly of the Internat.Union of Crystallography and Internat.Congress of Crystallography, Hamburg, August 9-18, 1984

A versatile high-temperature furnace for neutron four-circle diffractometers. (1984)

Heger, G., Kuhs, W., Massing, S.

Workshop on Sample Environments in Neutron and X-ray Experiements, Grenoble, F, February 13-15, 1984

Struktur und Bindung in Uebergangsmetall-Fluoriden M`I`IMe`I`VF§6. Neutronenbeugungs-Strukturuntersuchungen an CaSnF§6, FeZrF§6, und CrZrF§6. (1984)

Mayer, H.W., Reinen, D., Heger, G.

Journal of Solid State Chemistry, 50(1983) S.213-24

Control program of the neutron four-circle-diffractometer P110 at the ORPHEE reactor/CEN Saclay. (1984)

Guth, H., Reimers, W., Heger, G., Paulus, H.

KfK-3734 (Mai 84)

Untersuchung struktureller Phasenuebergaenge mit der Neutronenstreuung. (1984)

Heger, G.

Vortr.: Universitaet Hamburg, 5.Juli 1984

Transfer of four-circle diffractometers form Germany to France. (1984)

Heger, G.

Workshop on Sample Environments in Neutron and X-ray Experiements, Grenoble, F, February 13-15, 1984

Texturmessungen an martensitischen Staehlen. (1984)

Heger, G., Jung, V.

Vortr.: GKSS Forschungszentrum Geesthacht, 5.Juli 1984

Crystal structure and electron density studies of the two modifications of tetracyanoethylene (TCNE). (1984)

Drueck, U., Guth, H., Hellner, E., Dannoehl, H., Schweig, A., Heger, G.

13.Internationale Kristallographie-Tagung, Hamburg, 9.-18.August 1984

Magnetic phase diagram of Rb§2Cr§1§-§xMn§xCl§4(0 (1984)

Muenninghoff, G., Hellner, E., Treutmann, W., Heger, G., Lehner, N.

Journal of Physics C, 17(1984) S.1281-96

Phasenuebergaenge und Kristallstruktur in KMn§1§-§xZn§xF§3. (1983)

Heger, G., Lehner, N., Guth, H., Geick, R.

23.Tagung der Arbeitsgemeinschaft Kristallographie, Tuebingen, 7.-10.Maerz 1983

Crystal structure analyses on twinned crystals. (1983)

Heger, G.

Vortr.: Universitaet Aarhus, DK, 3.Februar 1983

Pulverneutronenbeugung an einigen M`I`IMe`I`VF§6-Verbindungen mit geordneter ReO§3-Struktur. (1983)

Mayer, H.W., Reinen, D., Heger, G.

23.Tagung der Arbeitsgemeinschaft Kristallographie, Tuebingen, 7.-10.Maerz 1983

Der Einfluss der Zinkbeimengung auf die Phasenuebergaenge in KMn§1§-§xZn§xF§3. (1983)

Lehner, N., Rauh, H., Kullmann, W., Geick, R., Eckold, G., Heger, G.

Fruehjahrstagung des Arbeitskreises Festkoerperphysik bei der Deutschen Physikalischen Gesellschaft, Freudenstadt, 21.-25.Maerz 1983

Structure of CrZrF§6 at different temperatures. - A neutron diffraction study. (1983)

Mayer, H.W., Reinen, D., Heger, G.

8th European Crystallographic Meeting, Liege, B, August 8-12, 1983

Gitterinstabilitaeten und Phasenuebergaenge in Fluorid-Perowskiten. (1983)

Strobel, K., Rauh, H., Geick, R., Lehner, N., Stirling, W., Bouillot, J., ...

Nukleare Festkoerperforschung: Bericht ueber das Arbeitstreffen des Verbundes Neutronenstreuung zur Untersuchung kondensierter Materie und Neutronenstreuung und komplementaere Methoden in Chemie und...

Structure analysis for the disordered cubic phase of rubidium cyanide. (1983)

Ehrhardt, K.D., Press, W., Heger, G.

Acta Crystallographica B, 39(1983) S.171-75

Control program of the neutron four-circle-diffractometer P32 at the SILOE reactor/CEN Grenoble. (1983)

Guth, H., Reimers, W., Heger, G., Paulus, H.

KfK-3596 (September 83)

Structure refinement of strontium nitrate, Sr(NO§3)§2, and barium nitrate, Ba(NO§3)§2. (1983)

Nowotny, H., Heger, G.

Acta Crystallographica C, 39(1983) S.952-56

Kristallstruktur und magnetisches Verhalten des quasi 2-dim. magnetischen Mischkristallsystems Rb§2(mn,Cr)Cl§4. (1983)

Heger, G.

Vortr.: Universitaet Hamburg, 28.November 1983

Structure analysis by combined X-ray and neutron diffraction. (1982)

Heger, G.

Vortr.: Universitaet Genf, CH, 21.Januar 1982

Hydrogen bonding and ferroelastic phase transition in anilinium bromide. (1982)

Heger, G.

Vortr.: Institut Max von Laue-Paul Langevin, Grenoble, F, 17.Maerz 1982

Die Renaissance der Pulver-Diffraktion insbesondere mit Neutronenstrahlen. (1982)

Heger, G.

Vortr.: Physikalisch Technische Bundesanstalt, Braunschweig, 21.April 1982

Stand der Auslagerung von Neutronenstreuanlagen an die franzoesischen Reaktoren SILOE/MELUSINE (Grenoble) und ORPHEE (Saclay). (1982)

Heger, G.

Vortr.: Verbundtreffen 'Neutronenstreuung zur Untersuchung kondensierter Materie', Hahn-Meitner-Institut, Berlin, 25.Maerz 1982

Kristallstruktur und Elektronendichte von gamma-Picolin. (1982)

Ohms, U., Guth, H., Treutmann, W., Heger, G.

Vortr.: Verbundtreffen 'Neutronenstreuung zur Untersuchung kondensierter Materie', Hahn-Meitner-Institut, Berlin, 25.Maerz 1982

Classical four-circle diffractometer for single crystal investigations with thermal neutrons. (1982)

Heger, G.

Vortr.: Workshop ueber Instrumentierung, Hahn-Meitner-Institut Berlin, 19.-20.April 1982

Hydrogen bonds in Na§3AsS§4.8D§2O: neutron diffraction, X-ray diffraction and vibrational spectroscopic studies. (1982)

Mereiter, K., Preisinger, A., Baumgartner, O., Heger, G., Mikenda, W., Steidl, H.

Acta Crystallographica B, 38(1982) S.401-08

Hydrogen bonds in Na§2S.9D§2O: neutron diffraction, X-ray diffraction and vibrational spectroscopic studies. (1982)

Preisinger, A., Mereiter, K., Baumgartner, O., Heger, G., Mikenda, W., Steidl, H.

Inorganica Chimica Acta, 57(1982) S.237-46

Magnetic phase diagram of the system Mn§1§-§xCr§xSb (0 (1982)

Reimers, W., Hellner, E., Treutmann, W., Heger, G.

Journal of Physics C: Solid State Physics, 15(1982) S.3597-3615

Nukleare Festkoerperforschung am FR2: Ergebnisbericht 1980/81 der externen Arbeitsgruppen. (1982)

Heger, G., Weitzel, H., [Hrsg.]

KfK-3381 (August 82)

Kristallstruktur der monoklinen Tieftemperaturphase des Aniliniumbromid, C§6H§5NH§3`+Br`-. (1982)

Fecher, G., Weiss, A., Heger, G.