Zobrazeno 1 - 10
of 21
pro vyhledávání: '"F. J. Zuniga"'
A Molecular Dynamics Study of an Incommensurate Modulation Compound: 4, 4′-Dichlorobiphenyl Sulphone
Publikováno v:
Ferroelectrics. 305:53-56
A molecular dynamics simulation of 4, 4'-dichlorobiphenyl sulfone was carried out in order to study the phase transition from a normal to incommensurate modulated phase observed experimentally. Agreements of simulated and experimental diffraction pat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::121aab945c21f0d2166d4b2a8d91e668
https://doi.org/10.1080/00150190490462397
https://doi.org/10.1080/00150190490462397
Publikováno v:
Ferroelectrics. 305:111-114
Following the general model proposed for the series of compounds Sr n (Nb,Ti) n O3n + 2 , the recently determined structure of the related compound NaCa 4 Nb 5 O 17 has been re-analyzed in superspace and refined using a set of crenel occupational fun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba5b8ff41db069c9bd75135738aa4770
https://doi.org/10.1080/00150190490462513
https://doi.org/10.1080/00150190490462513
Autor:
F. J. Zuniga, J. Darriet
Publikováno v:
Acta Crystallographica Section C: Crystal Structure Communications
Acta Crystallographica Section C: Crystal Structure Communications, International Union of Crystallography, 2003, 59 (2), pp.i18-i20. ⟨10.1107/S0108270102022746⟩
Acta Crystallographica Section C: Crystal Structure Communications, International Union of Crystallography, 2003, 59 (2), pp.i18-i20. ⟨10.1107/S0108270102022746⟩
International audience; Sodium tetracalcium pentaniobium heptadecaoxide, NaCa4Nb5O17, corresponds to the n = 5 term of the homologous AnBnO3n+2 family of structures composed of ABX3 perovskite layers. The structure consists of perovskite-type blocks
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::381c76f4c0d02a44e4edca500e8d774b
https://doi.org/10.1107/s0108270102022746
https://doi.org/10.1107/s0108270102022746
Autor:
A Gomez-Cuevas, F. J. Zuniga, I. Ruiz-Larrea, M. J. Tello, A. López-Echarri, Gotzon Madariaga, J. Zubillaga
Publikováno v:
Journal of Physics: Condensed Matter. 6:6751-6760
Optical, calorimetric, and X-ray measurements performed on (C2H5NH3)2ZnCl4 (C2ZnCl) together with a group theoretical analysis have revealed that this crystal shows a pure first-order ferroelastoelectric phase transition at 243.3 K. In the low-temper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d1e5dd389ed4e404c9501857ca986c3
https://doi.org/10.1088/0953-8984/6/34/007
https://doi.org/10.1088/0953-8984/6/34/007
Publikováno v:
Inorganic Chemistry. 32:6016-6022
The title compound, Cu(CO 2 NH 2 CHCH 2 CO 2 )(H 2 O) 2 , crystallizes in the space group C2, with a=9.504(1) A, b=10.038(3) A, c=7.555(1) A, β=94.01 o , and Z=4. The structure was solved by employing 807 independent reflections with I>3σ (I), by P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3477f0ee3a2bcd37f6cf387f6716c7b4
https://doi.org/10.1021/ic00078a019
https://doi.org/10.1021/ic00078a019
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 49:946-950
The room-temperature phase of K 2 ZnBr 4 is isomorphous with Sr 2 GeS 4 (P2 1 /m) while the low-temperature structure (P2 1 ) is slightly distorted [the phase transition occurs at 155 K]. Both structures contain highly deformed tetrahedral [ZnBr 4 ]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc53c10169903a980653af953c6c2b79
https://doi.org/10.1107/s0108270192009508
https://doi.org/10.1107/s0108270192009508
Publikováno v:
ChemInform. 22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21cb98891fa4f9e3fb43333773d3944e
https://doi.org/10.1002/chin.199123005
https://doi.org/10.1002/chin.199123005
Publikováno v:
ChemInform. 24
The room-temperature phase of K 2 ZnBr 4 is isomorphous with Sr 2 GeS 4 (P2 1 /m) while the low-temperature structure (P2 1 ) is slightly distorted [the phase transition occurs at 155 K]. Both structures contain highly deformed tetrahedral [ZnBr 4 ]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d24f6c7a7596371b6c8449ca23d05e2
https://doi.org/10.1002/chin.199340010
https://doi.org/10.1002/chin.199340010
Publikováno v:
Journal of Physics: Condensed Matter. 4:8551-8564
Inelastic neutron scattering experiments in K2SeO4, Cs2SeO4 and K2CrO4 are reported. The lowest Sigma 3- Sigma 2 phonon branches along the alpha *-axis in their Pnam phase have been characterised for the three compounds. The results are compared with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff94ef43c31fd654269bb0d048b04291
https://doi.org/10.1088/0953-8984/4/44/016
https://doi.org/10.1088/0953-8984/4/44/016
Autor:
F. J. Zuniga, J. Darriet
Publikováno v:
ChemInform. 34
Sodium tetracalcium pentaniobium heptadecaoxide, NaCa 4 Nb 5 O 17 , corresponds to the n = 5 term of the homologous A n B n O 3n+2 family of structures composed of ABX 3 perovskite layers. The structure consists of perovskite-type blocks of n = 5 lay
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3a1ee19f1ef78471ec9a9c7ab2c0b11
https://doi.org/10.1002/chin.200320007
https://doi.org/10.1002/chin.200320007