| 白钨矿结构的钨,钼酸盐晶体的光吸收边及其起因 |
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| 引用本文： | 张明荣,李倍俊.白钨矿结构的钨,钼酸盐晶体的光吸收边及其起因[J].光学学报,1998,18(11):591-1596. |
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| 作者姓名： | 张明荣 李倍俊 |
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| 作者单位： | 中国科学院上海硅酸盐研究所中试基地 |
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| 摘 要： | 比较了一些白钨矿结构的钨，钼酸盐晶体（如未掺杂的ＣａＷＯ４，ＰｂＷＯ４，ＣａＭｏＯ，ＰｂＭｏＯ４晶体）的透射光谱，发现这些晶体的光吸收边的相对位置用普遍认为的观点，即白钨矿结构的钨，钼酸盐晶体的光吸收边起源于具有Ｔｄ对称性的Ｗ（Ｍｏ）Ｏ＾２－４基团的电子从ｔ１轨道的２ｅ轨道的转移激发，不能给出了圆满阐释，而应代之以新的观点，作者认为这类晶体的光吸收可能起因于Ｄ２ｄ对称的Ｗ（Ｍｏ）Ｏ＾２－４基团内的
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| 关 键 词： | 白钨矿结构 钨酸盐 钼酸盐 晶体 光吸收边 |
| 收稿时间： | 1997/10/5 |
Optical Absorption Edges and their Origin of Scheelite Structured Tungstate and Molybdate Crystals |
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| Zhang Mingrong,Li Peijun,Hu Guanqin,Yin Zhiwen.Optical Absorption Edges and their Origin of Scheelite Structured Tungstate and Molybdate Crystals[J].Acta Optica Sinica,1998,18(11):591-1596. |
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| Authors: | Zhang Mingrong Li Peijun Hu Guanqin Yin Zhiwen |
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| Abstract: | The transmission spectra and optical absorption edges (OAEs) of some scheelite structured crystals, such as undoped CaWO 4, PbWO 4, CaMoO 4 and PbMoO 4 crystals, were comparatively studied. It was found that the relative location of their OAEs can not be explained from a widely adopted viewpoint that the OAEs originate from electron transfer from t 1 orbital to 2e orbital of W(Mo)O 2- 4 group with T d symmetry. But it can be explained with the electron transfer from 1a 2 orbital to 2b 1 orbital within the W(Mo)O 2- 4 group with D 2d symmetry. The OAEs of the above mentioned crystals and the PbWO 4 crystals doped with lanthanum, niobium and molybdenum respectively were interpreted briefly from the present viewpoint and the ion polarization model. |
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| Keywords: | scheelite structure tungstate crystal molybdate crystal doped tunsgate crystal optical absorption edge |
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