Electronic Structures of Square Planar Coordinated Transition Metal Ions in Compounds with Gillespite Structure Electronic structures of square planar coordinated transition metal ions in compounds with gillespite structure期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Electronic Structures of Square Planar Coordinated Transition Metal Ions in Compounds with Gillespite Structure

摘要：
关键词：	金属矿物电子结构激光闪光管硅铁钡矿活性氧法
Electronic structures of square planar coordinated transition metal ions in compounds with gillespite structure

Authors:	Lin Chuanyi

Institution:	(1) Institute of Geochemistry, Academia Sinica, China

Abstract:	Electronic structures of square planar coordinated transition metal ions in BaCuSi₄O₁₀ and CaCrSi₄O₁₀ are investigated using the ligand-field theory (LFT), angular overlap model (AOM) and iterative extended Hückel molecular orbital theory (IET). The electronic energy levels of the natural mineral dioptase are also investigated, in which the Cu²⁺ ions occupy the sites of pseudo D_4h symmetry. Both LFT and AOM predict that the crystal-field levels of transition metal ions in these compounds follow such an order that E (²B_1g <E(²B_2g <E(²A_1g )<E(²E_g ), and the frequencies of the crystal-field transitions obtained from point charge calculations are in good agreement with those observed. However, the energy-level order cannot be determined unambiguously from the IET calculation because it depends on the values of parameters chosen for the calculation.

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