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首页> 外文期刊>The American mineralogist >The role of silver on the stabilization of the incommensurately modulated structure in calaverite, AuTe_2
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The role of silver on the stabilization of the incommensurately modulated structure in calaverite, AuTe_2

机译:银对钙铝石AuTe_2中无比调节结构的稳定作用

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摘要

Structural investigations of several minerals belonging to the calaverite group with composition Au1–xAgxTe2 (x = 0.00, 0.02, 0.05, 0.09, 0.19, and 0.33) indicate that Ag is randomly distributed on the Au sites. This suppresses the valence fluctuation of Au and, therefore, the structure modulations. The results are compared with the previously published incommensurately modulated structure of calaverite, Au0.9Ag0.1Te2, which is characterized by valence fluctuations of Au reinforced by an ordered distribution of Ag. The (3+1)-dimensional calaverite structure type is able to reproduce both (3+1)D and 3D related structures with the general formula AB2 (A = Au, Ag, Cu, Nb, Ta; B = Te).
机译:对属于钙铝石组的几种矿物的成分为Au1-xAgxTe2(x = 0.00、0.02、0.05、0.09、0.19和0.33)的结构研究表明,Ag随机分布在Au部位。这抑制了Au的价数波动,并因此抑制了结构调制。将该结果与先前发表的钙锰矿的不相称的调制结构Au0.9Ag0.1Te2进行了比较,该结构的特征在于通过有序分布的Ag增强的Au的化合价涨落。 (3 + 1)维钙铝石结构类型能够再现具有通式AB2(A = Au,Ag,Cu,Nb,Ta; B = Te)的(3 + 1)D和3D相关结构。

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