Expansivity of arsenopyrite (FeAsS) determined by in situ synchrotron X-ray diffraction experiment at high temperature and ambient pressure

被引：0

作者：

Hu, Xianxu ^{[1
,2
]}

Zhang, Bo ^{[1
,2
]}

Kuang, Yunqian ^{[1
,2
]}

Chen, Wei ^{[3
]}

Fan, Dawei ^{[1
]}

Zhou, Wenge ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang 550081, Guizhou, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Guizhou Polytech Construct, Guiyang 551400, Guizhou, Peoples R China

来源：

HIGH TEMPERATURES-HIGH PRESSURES | 2018年 / 47卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Arsenopyrite; Thermal expansivity; High temperature; X-ray diffraction; Synchrotron radiation; BULK MODULUS; INTERMETALLIC COMPOUNDS; CRYSTAL-STRUCTURE; 10; GPA; ELECTRONEGATIVITY; BEHAVIOR;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The high-temperature cell parameters of arsenopyrite (FeAsS) have been determined from 300 to 673 K through in situ angle-dispersive X-ray diffraction experiments with synchrotron radiation at Beijing Synchrotron Radiation Facility (BSRF). No phase change has been observed up to the maximum temperature in this study. Thermal expansion coefficients of arsenopyrite were determined from the measured cell volumes with equations of the form alpha= alpha(0) + alpha T-1+alpha(2)/T(2)for the first time. The value of volume expansion coefficient is 3.1(2) x 10(-5) K-1. Furthermore, we confirm that the linear expansivities along a, b and c directions of arsenopyrite are almost isotropic [alpha(a) = 1.2(3) x 10(-5), alpha(b) = 0.8(3) x 10(-5), and alpha(c), = 0.8(2) x 10(-5) K-1] within their uncertainties. Furthermore, the effects of anionic substitution on the determination of expansivity between arsenopyrite and pyrite were discussed.

引用

页码：323 / 330

页数：8