FLUORITE-RELATED PHASES LN3MO7, LN = RARE-EARTH, Y OR SC, M = NB, SB OR TA .3. STRUCTURE OF THE NONSTOICHIOMETRIC Y3TAO7 PHASE

被引：26

作者：

ROSSELL, HJ

机构：

[1] CSIRO, Division of Materials Science, Engineering Ceramics and Refractories Laboratory, Melbourne, 3001 Vic., P.O. Box 4331, GPO

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1979年 / 27卷 / 03期

关键词：

D O I：

10.1016/0022-4596(79)90169-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The orthorhombic fluorite-related superstructure phase Y3TaO7 is non-stoichiometric; the Y2O3 content may be varied from 75.0 to about 72.5 mole% without incurring structural changes. For overall Y2O3 contents from 72.0 to 70.5 mole%, the crystal symmetry changes from C2221 to Cmmm, and the c axis becomes halved. The structure of the low-Y2O3 material has been determined from powder X-ray diffraction intensities supplemented by single crystal electron-optical data. The relationship of this structure to that of stoichiometric Y3TaO7 is discussed. © 1979.

引用

页码：287 / 292

页数：6