High-pressure study on dioxolane silica sodalite (C3H6O2)2[Si12O24] -: neutron and X-ray powder diffraction experiments

被引：15

作者：

Knorr, K ^{[1
]}

Braunbarth, CM

van de Goor, G

Behrens, P

Griewatsch, C

Depmeier, W

机构：

[1] Hahn Meitner Inst Kernforsch Berlin GmbH, Bereich Strukturforsch NE, D-14109 Berlin, Germany

[2] Univ Konstanz, Fak Chem, D-78434 Constance, Germany

[3] Univ Munich, Inst Anorgan Chem, D-80333 Munich, Germany

[4] Univ Kiel, Inst Geowissensch Mineral Kristallogs, D-24098 Kiel, Germany

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 113卷 / 09期

关键词：

insulators; crystal structure and symmetry; phase transitions; strain; high pressure;

D O I：

10.1016/S0038-1098(99)00516-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron and X-ray high-pressure powder-diffraction experiments on silica sodalite with 1,3-dioxolane as a template molecule, (C3H6O2)(2)[Si12O24], were performed up to a maximum pressure of 2.7 GPa. A phase transition from the fully expanded structure at ambient pressure, space group Im (3) over bar m, to the acentric space group I (4) over bar 3m was derived from the observed compression behaviour. A ferro-elastic phase transition appears at about 1.2 GPa to the rhombohedral crystal system. From symmetry analysis and the observed transition behaviour the space groups R3 or R3m are proposed for p > 1.2 GPa. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：503 / 507

页数：5

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