Vibrational, Spectrum of Triclinic Potassium Dichromate
Vibrational, Spectrum of Triclinic Potassium Dichromate
复制标题
三斜晶系重铬酸钾的振动光谱
DOI：
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发表时间：
1969
期刊：
影响因子：
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通讯作者：
C. Bricker
中科院分区：
文献类型：
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作者：
R. L. Carter;C. Bricker
Stammreich和同事1首先注意到三斜晶系重铬酸钾的红外光谱中的吸收带成对出现，他们假设这种效应可能是由于重铬酸钾离子在晶格中的不同非等效排列。Vinh及其同事2获得了三斜晶系重铬酸钾的拉曼光谱，最近提出这种倍增效应表明晶格中存在反转中心3。我们还研究了重铬酸钾的拉曼光谱。我们的光谱似乎比以前报道的更好地解决，从而使一个更完整的分配。我们的工作也受益于最近和高度精细的X射线结构研究4，我们已经能够验证该研究的空间群分配。
Abstract Stammreich and co-workers1 first noted that the absorption bands in the infrared spectra- of triclinic potassium dichromate appear in pairs, and they postulated that this effect might be due to different non-equivalent arrangements of dichromate ions in the crystal lattice. Vinh and co-workers2 have obtained the Raman spectrum of triclinic potassium dichromate and have recently suggested that this doubling effect points to the presence of an inversion center in the crystal lattice3. We have also studied the Raman spectrum of potassium dichromate. Our spectra appear to be better resolved than those previously reported, thereby enabling a more complete assignment. Our work also benefits from a recent and highly refined x-ray structure study4, and we have been able to verify the space group assignment of that study.