Cu2Mg5Sn5Se16 – the first selenospinel of the A2B5C5X16 type

Zeitschrift für Naturforschung B Pub Date : 2024-04-05 DOI:10.1515/znb-2023-0098

Kevin D. Profita, Eva M. Heppke

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Abstract

A new member of the A2B5C5X16 family of compounds – the first one containing Se – has been synthesized. Following a one-step mechanochemical synthesis route, starting from the binary selenides and Mg metal, Cu2Mg5Sn5Se16 has been obtained. Structural evaluation was carried out using X-ray diffraction with subsequent Rietveld refinement. Cu2Mg5Sn5Se16 adopts the spinel type with space group Fd

3 ‾

$\overline{3}$

m and exhibits a statistical distribution of Cu, Mg, and Sn on Wyckoff position 16d whereas Wyckoff position 8a is only occupied by Mg. Despite the fact that structures containing MgSe4 tetrahedra are rare in the literature, it appeared to be the most plausible way of distributing the cations in this compound.

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Cu2Mg5Sn5Se16 - 第一颗 A2B5C5X16 型硒磷矿石

我们合成了 A2B5C5X16 化合物家族的一个新成员--第一个含 Se 的化合物。从二元硒化物和金属镁开始，通过一步机械化学合成路线，获得了 Cu2Mg5Sn5Se16。利用 X 射线衍射和随后的里特维尔德精炼进行了结构评估。Cu2Mg5Sn5Se16 采用空间群为 Fd 3 ‾ $\overline{3}$ m 的尖晶石类型，并显示出铜、镁和锡在 Wyckoff 位置 16d 上的统计分布，而 Wyckoff 位置 8a 仅被镁占据。尽管含有 MgSe4 四面体的结构在文献中并不多见，但这似乎是该化合物中阳离子分布的最合理方式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Zeitschrift für Naturforschung B

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