| 天然单斜辉石中Cr ~(3+)的晶位对称性和偏振吸收谱的分析 |
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| 引用本文： | 赵尚勃,谢军楷.天然单斜辉石中Cr ~(3+)的晶位对称性和偏振吸收谱的分析[J].矿物学报,1988(3). |
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| 作者姓名： | 赵尚勃 谢军楷 |
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| 作者单位： | 四川师范大学化学系 成都
(赵尚勃)，四川师范大学化学系 成都(谢军楷) |
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| 摘 要： | 通过对单斜辉石系列钠铬辉石-硬玉样品中Cr~(3+)偏振吸收谱的谱带强度、形状及位置的分析,提出:这类矿物晶体中Cr~(3+)应处于四角畸变D_4对称晶场的晶位。由此计算出的谱带位置和观测结果一致。说明了D_4晶位假设更优于Khomenko等提出的三角畸变C_(3v)对称假说。
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| 关 键 词： | 单斜辉石 铬透辉石 钠铬辉石 硬玉 偏振吸收谱 |
DETERMINATION OF THE SITE SYMMETRY AND ANALYSIS OF THE POLARIZED ABSORPTION SPECTRA OF Cr~(3+) IONS IN CLINOPYROXENES |
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| Zhao Sangbo Xie Junkai.DETERMINATION OF THE SITE SYMMETRY AND ANALYSIS OF THE POLARIZED ABSORPTION SPECTRA OF Cr~(3+) IONS IN CLINOPYROXENES[J].Acta Mineralogica Sinica,1988(3). |
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| Authors: | Zhao Sangbo Xie Junkai |
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| Abstract: | Judging from the absorbancy, shape and band position of Cr~(3+) polarized absorption spectra, it is proposed that the Cr~(3+) ions occupy the D_4 symmetry site in clinopyroxenes.The absorption spectrum has been calculated by means of the D_4 symmetry energy matrices. Good agreement between theoretical and experimental values shows that the pseudotetragonal symmetry (D_4, D_(4h) or C_(4v)) has the advantage over the pseudo-trigonal symmetry C_(3v) proposed for the M_1-site of Cr~(8+) by Khomenko et al. |
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| Keywords: | clinopyroxene chromdiopside ureyitejadeite jadeite polarized absorption spectrum |
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