STRUCTURE REFINEMENT OF TRIGONAL ZINC-CHLORINE BORACITE, ZN3B7O13CL, FROM SINGLE-CRYSTAL AND POWDER X-RAY-DIFFRACTION

被引：14

作者：

MAO, SY ^{[1
]}

MENDOZAALVAREZ, ME ^{[1
]}

DEPMEIER, W ^{[1
]}

KUBEL, F ^{[1
]}

SCHMID, H ^{[1
]}

YVON, K ^{[1
]}

机构：

[1] UNIV GENEVA,CRISTALLOG AUX RAYONS LAB 10,CH-1211 GENEVA 4,SWITZERLAND

来源：

FERROELECTRICS | 1991年 / 115卷 / 1-3期

关键词：

BORACITE; X-RAY DIFFRACTION; STRUCTURE;

D O I：

10.1080/00150199108014482

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zn3B7013Cl: R3c, ahcx = 8.53725(7) A, chcx = 20.96849(25) A, Vhcx = 1323.53(3) A,3 arh = 8.5527(1) A, arh = 59.8809(1)ö, Dx = 3.8931Mg/ra3, R. = 0.081 and RB = 0.047 for 35 reflections and 44 parameters from powder profile refinement (T = 298 K); R = 0.051 for 1568 reflections and 74 parameters from single-crystal refinement (T = 298 K). A comparison with isostructural iron-chlorine boracite, Fe3B7013Cl, suggests that the magnitude of the rhombohedral lattice shear in trigonal boracites depends in a complex manner on the bonding requirement of the five-coordinate metal ions, and the space requirement of an oxygen-boron framework that is relatively rigid with respect to changes of O-B bondlengths and O-O contact distances, but more flexible with respect to changes of bond angles and torsion angles. © 1991, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：91 / 96

页数：6

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