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• 作者：Jovica Stojanovi&#263 ; ^a ; ^{j.stojanovic@itnms.ac.rs} ; Tamara Đ ; orđ ; evi&#263 ; ^b ; Ljiljana Karanovi&#263 ; ^c
• 关键词：Inorganic materials ; Chemical synthesis ; Crystal structure ; X-ray diffraction
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：15 April, 2012
• 卷：520
• 期：Complete
• 页码：180-189
• 文件大小：1150 K

摘要

Two new compounds, Cd_1.16Zn_2.34(AsO₄)_1.5(HAsO₄)(H₂AsO₄)_0.5 (1) and Cd_0.74Mg_2.76(AsO₄)_1.5(HAsO₄)(H₂AsO₄)_0.5 (2), have been prepared hydrothermally. Their crystal structures consist of chains of edge-sharing M1O₄(OH_0.5)₂, M1aO₄(OH_0.5)₂, M2O₅(OH_0.5), and M2aO₅(OH_0.5) octahedra (M1, M1a = Zn, Cd; M2, M2a = Zn for 1, and M1, M1a = Mg, Cd; M2, M2a = Mg for 2) that are stacked parallel to (1 0 1) and are connected by the [(AsO₄)_0.5(AsO₃(OH))_0.5]^{2.5鈭?/sup> and [(AsO₄)_0.5(AsO₂(OH)₂)_0.5]2鈭?/sup> tetrahedra. These chains produce two types of channels parallel to the c-axis. Cd atoms are located in channels 2, while in channels 1 are situated hydrogen atoms of OH groups. The infrared spectra clearly show the presence of broad OH stretching and bending vibrations centred at 3236, 2392 1575 and 1396 cm鈭? in (1), and 3210, 2379 1602 and 1310 cm鈭? in (2). The OH stretching frequency is in good agreement with O鈰疧 distances. Furthermore, structural characteristics of compounds with similar alluaudite-like structures were discussed.}