A tetragonal polymorph of caesium hydroxide monohydrate, CsOH•H2O, from X-ray powder data

被引:5
作者
Cerny, R [1 ]
Favre-Nicolin, V [1 ]
Bertheville, B [1 ]
机构
[1] Univ Geneva, Lab Cristallog, CH-1211 Geneva 4, Switzerland
关键词
D O I
10.1107/S0108270101021928
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Tetragonal caesium hydroxide monohydrate, CsOH.H2O, a clathrate hydrate, is a polymorph of three known hexagonal or pseudo-hexagonal modifications. It was obtained as a by-product in a high-pressure experiment. Whether it is a high-pressure polymorph, however, remains to be verified. The Cs atoms are situated in cavities of the form of a bicapped pentagonal prism, within an infinite three-dimensional hydrogen-bonded oxygen framework that is locally identical to layers found in the hexagonal modifications. The Cs atom and one of the two H atoms are at sites with (m) over bar m2 symmetry, the O atom has mm site symmetry and the second H atom has 2/m symmetry.
引用
收藏
页码:i31 / i32
页数:2
相关论文
共 7 条
[1]   BOND-VALENCE PARAMETERS FOR SOLIDS [J].
BRESE, NE ;
OKEEFFE, M .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1991, 47 :192-197
[2]   EMPIRICAL PARAMETERS FOR CALCULATING CATION-OXYGEN BOND VALENCES [J].
BROWN, ID ;
WU, KK .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1976, 32 (JUL15) :1957-1959
[3]  
DOWTY E, 1993, ATOMS VERSION 2 3
[4]   STRUCTURE AND PROPERTIES OF CESIUM HYDROXIDE MONOHYDRATE, A COMPOUND CHARACTERIZED BY LAYERED [H3O2-] POLYANIONS IN ITS HIGH-TEMPERATURE FORM [J].
JACOBS, H ;
HARBRECHT, B ;
MULLER, P ;
BRONGER, W .
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1982, 491 (08) :154-162
[5]  
Rodríguez-Martínez J, 1998, AM WAT RES, V98, P3
[6]  
ROISNEL T, 1998, WINPLOTR
[7]   DYNAMICS OF THE HYDROGEN-BOND IN CSH3O2 FROM QUASIELASTIC NEUTRON-SCATTERING [J].
STAHN, M ;
LECHNER, RE ;
DACHS, H ;
JACOBS, HE .
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1983, 16 (26) :5073-5082