CRYSTAL-STRUCTURE OF (CH3)2NH2AL(SO4)2-CENTER-DOT-6H2O IN THE LOW-TEMPERATURE FERROELECTRIC PHASE

被引：0
|
作者：
PIETRASZKO, A
LUKASZEWICZ, K
机构：
来源：
POLISH JOURNAL OF CHEMISTRY | 1994年 / 68卷 / 06期
关键词：
CRYSTAL STRUCTURE; FERROELECTRIC; HYDROGEN BONDS; PHASE TRANSITION; LOW TEMPERATURE CRYSTAL STRUCTURE ANALYSIS;
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中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
(CH3)2NH2Al(SO4)2.6H2O (DMAlS) in the low temperature ferroelectric phase is monoclinic Pn. At T = 95 K, a = 6.445(1), b = 10.688(2), c = 11.109(2) angstrom, beta = 99.71(3)degrees. Ferroelectric properties are induced by the reorientation of the dimethyl ammonium ion disordered in the paraelectric phase and ordered in the ferroelectric one. Crystal structure of partly deuterated DMAAlS determined at T = 110 and 135 K, has been found to be similar to pure DMAAlS.
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页码：1239 / 1243
页数：5
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