Structural, elastic and vibrational properties of celestite, SrSO4, from synchrotron x-ray diffraction, thermal diffuse scattering and Raman scattering

Structural, elastic and vibrational properties of celestite, SrSO4, from synchrotron x-ray diffraction, thermal diffuse scattering and Raman scattering
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来自同步加速器 X 射线衍射、热漫散射和拉曼散射的天青石 SrSO4 的结构、弹性和振动特性

DOI:
10.1088/1361-648x/aaf0ef
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发表时间:
2019
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
通讯作者:
Winkler B
Winkler B
中科院分区:
--
文献类型:
--
作者:
Girard A;Stekiel M;Spahr D;Morgenroth W;Wehinger B;Milman V;Tra Nguyen- Thanh;Mirone A;Minelli A;Paolasini L;Bosak A;Winkler B

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为了解决已发表的SrSO数据不一致的问题,利用热漫射散射、高压粉末同步x射线衍射、拉曼散射和DFT计算研究了天青石的弹性和相稳定性。在室温下,SrSO的结构在高达62 GPa时是稳定的。弹性刚度张量的分量的首选值已经用x射线热扩散散射确定,并且(在GPa):,,,,,,,,。体积模量的首选值是GPa。这项工作表明,在两个温度下收集的热漫射散射可以确定具有低空间群对称性的晶体的全弹性张量。
In order to resolve inconsistencies encountered in published data for SrSO, the elasticity and the phase stability of celestite has been studied using thermal diffuse scattering, high pressure powder synchrotron x-ray diffraction, Raman scattering and DFT calculations. The structure of SrSO is found to be stable up to 62 GPa at ambient temperature. The preferred values for the components of the elastic stiffness tensor have been determined using x-ray thermal diffuse scattering and are (in GPa):,,,,,,,,. The preferred value for the bulk modulus is GPa. This work shows that thermal diffuse scattering collected at two temperatures allows the determination of the full elastic tensor of crystals with low space group symmetry.
硫酸钡锶(重晶石-天青石)固溶体的 X 射线衍射分析
DOI: --
发表时间: 1989
期刊: Powder Diffraction
影响因子: 0.5
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