STRUCTURE DEFORMATIONS AND EXISTENCE OF THE ALPHA-BETA TRANSITION IN MXO4 QUARTZ-LIKE MATERIALS

被引：72

作者：

PHILIPPOT, E

GOIFFON, A

IBANEZ, A

PINTARD, M

机构：

[1] Laboratoire de physicochimie des Matériaux solides, UM II, URA D0407-CNRS, F-34095 Montpellier cédex 5, cc 003, Place E. Bataillon

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1994年 / 110卷 / 02期

关键词：

D O I：

10.1006/jssc.1994.1180

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The paramount importance of M-X interactions in determining the existence or nonexistence of an alpha-beta transition can be shown by a general survey of all known or predicted quartz-like materials, MXO4. This distance, M-X, defined as the nonbonded radius sum, prescribes structure packing. If the M-O and X-O distances increase, intertetrahedron distortion will increase in relation to the decrease of the M-O-X angle, theta, and increase of the tilt angle, delta. From a structural point of view, a borderline value of delta approximately 22-degrees or theta approximately 136-degrees has been extrapolated for the existence of an alpha-beta transition. (C) 1994 Academic Press, Inc.

引用

页码：356 / 362

页数：7

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