Analysis of LiKSO4 crystals in the temperature range from 573 to 943 K [0.03%]
573至943 K温度范围内LiKSO4晶体的分析
C B Pinheiro,M A Pimenta,G Chapuis et al.
C B Pinheiro et al.
The structural phases observed in LiKSO4 crystals due to thermotropic transitions have been studied for more than a century. Nowadays many different phases are referenced, but some of the results are still controversial. Structural studies ...
Y Zhao,F Chu,R B Von Dreele et al.
Y Zhao et al.
We report a high-resolution synchrotron X-ray powder diffraction study on HfV(2), hafnium divanadium, at low temperatures. In this work we show, for the first time, a complete sequence of structural phase transitions of HfV(2) from cubic (F...
E A Zhurova,Y Ivanov,V Zavodnik et al.
E A Zhurova et al.
The atomic interactions and anharmonicity of atomic displacements in the virtual ferroelectric KTaO3, potassium tantalate, have been studied using accurate single-crystal X-ray diffraction at room temperature. The multipole analysis of elec...
Study of NH4+ in the zeolite phillipsite by combined synchrotron powder diffraction and IR spectroscopy [0.03%]
同步加量红外光谱联合研究斜发沸石中的NH4+
A F Gualtieri
A F Gualtieri
The Rietveld refinement on synchrotron data of three natural hydrated NH4+-exchanged phillipsites with different Si/Al ratios allowed acceptable assignment of the NH4+ sites. These phillipsites display the typical monoclinic P2(1)/m cell, w...
Structure of uranium(VI) oxide dihydrate, UO3.2H2O; synthetic meta-schoepite (UO2)4O(OH)6.5H2O [0.03%]
六价铀化合物尿素二水合物的结构；合成/meta- Schoepite（UO2）4O（OH）6.5H2O结构
M T Weller,M E Light,T Gelbrich
M T Weller
Structure of uranium(VI) oxide dihydrate, P03.2H20; synthetic meta-schoepite (UO2)40(OH)6.5H20 f The structure of uranium oxide dihydrate, also known as meta-schoepite (UO2)4O(OH)6.5H2O, has been determined from a synthetic single crystal. ...
Neutron Rietveld refinement of the incommensurate phase of the ordered perovskite Pb2CoWO6 [0.03%]
有序钙钛矿Pb2CoWO6的非调和相的中子Rietveld精修研究
G Baldinozzi,G Calvarin,P Sciau et al.
G Baldinozzi et al.
The incommensurate structure of lead cobalt tungstate has been refined by the Rietveld method on neutron data collected at 250 K. The space group is planar monoclinic 12/m(alpha0gamma)0s [a = 7.9602 (4), b = 5.6779 (3), c = 5.6967 (3) A, be...
L García-Rodríguez,A Rute-Pérez,J R Piñero et al.
L García-Rodríguez et al.
Bond-valence parameters r0 and b, relating bond valence and bond length, are calculated for interactions between the ammonium ion and anions X = O, F, Cl. Searches in the Cambridge Structural Database (CSD) and in the Inorganic Crystal Stru...
Towards a unified description of the AMOB2O5 (A=K, Rb, Cs, Tl; M=Nb, Ta) family of compounds [0.03%]
关于AMOB2O5(A=K，Rb，Cs，Tl；M=Nb，Ta)化合物家族统一描述的发展
S Schmid,R L Withers,D Corker et al.
S Schmid et al.
Single-crystal X-ray diffraction data (Mo Kalpha radiation) are used to re-refine the structure of RbNbOB2O5, rubidium niobium oxo pyroborate. The structure is refined as an incommensurate modulated structure with superspace group symmetry ...
How precise are measurements of unit-cell dimensions from single crystals? [0.03%]
单晶体中单元胞尺寸的测量精确度如何？
F H Herbstein
F H Herbstein
The results of single-site and many-site measurements of cell dimensions from single crystals are compared for Bond and four-circle diffractometers using samples of corundum (essentially pure rhombohedral alpha-Al2O3, aluminum oxide) of hig...
Crystal chemistry of some synthetic 2-oxa-steroids: conformation, packing motifs and isostructurality [0.03%]
A Anthony,M Jaskólski,A Nangia
A Anthony
The crystal structures of six synthetic 2-oxa-steroids (A-ring lactone steroids) have been determined by single-crystal X-ray diffraction. The conformation and hydrogen bonding in these oxa-steroids is compared with packing motifs in the na...