CRYSTAL-GROWTH, ROOM-TEMPERATURE CRYSTAL-STRUCTURE AND PHASE-TRANSITIONS OF KMNPO4

被引:21
作者
LUJAN, M
KUBEL, F
SCHMID, H
机构
[1] Département de Chimie Minérale, Analytique et Appliquée, Faculté des Sciences, Université de Genève 30, CH-1211 Genève 4, quai Ernest-Ansermet
来源
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 1995年 / 50卷 / 08期
关键词
MANGANESE POTASSIUM ORTHOPHOSPHATE; CRYSTAL STRUCTURE; CRYSTAL GROWTH; PHASE TRANSITIONS;
D O I
10.1515/znb-1995-0815
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Single crystals of KMnPO4 grown in a KCl flux show ferroelastic domains, The structure was determined on an optically controlled single domain crystal by X-ray diffraction methods. The cell is triclinic with dimensions a = 5.4813(5), b = 8.627(1), c = 8.887(1), in Angstrom, alpha = 87.73(1)degrees, beta = 89.10(1)degrees, gamma = 88.01(1)degrees, V-M = 419.6(1) Angstrom(3) and Z = 4. The structure is closely related to the stuffed beta-tridymite type. DTA experiments between room temperature and 1000 degrees C and polarized light microscopy observations showed four phase transitions: at 165, 330, 353 and 707 degrees C.
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页码:1210 / 1214
页数:5
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