Ordering of iron vacancies in monoclinic jarosites

被引：21

作者：

Scarlett, Nicola V. V. ^{[1
]}

Grey, Ian E. ^{[1
]}

Brand, Helen E. A. ^{[1
]}

机构：

[1] CSIRO, Div Proc Sci & Engn, Clayton, Vic 3169, Australia

来源：

AMERICAN MINERALOGIST | 2010年 / 95卷 / 10期

关键词：

Jarosites; iron-deficient jarosites; monoclinic jarosites; iron-site vacancy ordering in jarosites; SOLID-SOLUTION SERIES; KAGOME ANTIFERROMAGNETS; MAGNETIC-PROPERTIES; CRYSTAL-CHEMISTRY; SITE OCCUPANCY; MINERALOGY; LATTICE;

D O I：

10.2138/am.2010.3591

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The results of in situ synchrotron X-ray powder diffraction experiments conducted during the synthesis of iron-deficient Na(+)/H(3)O(+) and K(+)/H(3)O(+) jarosites at temperatures in the range 80 to 120 C are presented. They demonstrate that samples can be prepared in which the iron-site vacancies are ordered. The ordering is accompanied by a lowering of symmetry, from rhombohedral, space group R3 ($) over barm, to monoclinic, C2/m. The implications for magnetic properties are discussed.

引用

页码：1590 / 1593

页数：4

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