作者:S. Khorari、A. Rulmont、P. Tarte
DOI:10.1006/jssc.1997.7526
日期:1997.11
The arsenate Na3In2(AsO4)3has been synthesized and investigated by X-ray diffraction and vibrational spectroscopy. According to a Rietveld analysis, it is monoclinic, space group C2/c,Z=4, witha=12.6025 (1),b=13.1699 (1),c=6.8335 (1) Å,β=113.7422 (5). It has an alluaudite-like structure, with the three Na+cations located on the three large sites X(2), X(1), and M(1), and the two In3+cations on the
已经合成了砷酸盐Na 3 In 2(AsO 4)3,并通过X射线衍射和振动光谱进行了研究。根据本发明的Rietveld分析,它是单斜晶系,空间群C2 / c ^,Ž = 4,用一个= 12.6025(1),b = 13.1699(1),C ^ = 6.8335(1)埃,β = 113.7422(5)。它具有类似变石的结构,其中三个Na +阳离子位于三个大位点X(2),X(1)和M(1)上,两个In 3+该结构的M(2)个位置上的阳离子。这是一种新型的化学配方(像钙铝石一样)(不含二价阳离子,并且钠离子完全占据了X(2),X(1)和M(1)的位置)。正如低对称性和阳离子的有序分布所预期的那样,拉曼光谱和红外光谱显示出许多尖锐的谱带,但是这种复杂性妨碍了这些谱带的详细分配。简要讨论了与其他类似钙铝石化合物的结构相似性或差异。