Vibrational spectra of single-crystal topaz
Vibrational spectra of single-crystal topaz
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单晶黄玉的振动光谱
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
B. Piriou
中科院分区：
文献类型：
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作者：
J. Bény;B. Piriou
用拉曼光谱研究了一个黄玉单晶，确定了高频范围内的内模，并与红外数据进行了比较。所有的活动模都表现出重要的Davydov分裂（150 cm−1），但我们发现了一个小的Bethe分裂（14.5 cm−1），与非常规则的SiO 4四面体一致。由于v1值很高（约920 cm−1），拉曼激活模呈现出v1/v3的混合特征，最后OH取代F分裂了Ag内模，并在3650 cm−1，3639 cm−1和1165 cm−1处产生了一些合适的模。
A single-crystal of topaz was studied by Raman spectroscopy to assign the internal modes of the high-frequency range and to compare with infrared data.All active modes exhibit an important Davydov splitting (150 cm−1) but we have found a small Bethe splitting (14.5 cm−1) consistent with a very regular SiO4 tetrahedron. Because of a high value of v1 (∼920 cm−1) the Raman active modes present a mixed v1/v3 character.Finally the substitution of OH for F splits an Ag internal mode and lead to some proper modes at 3650 cm−1, 3639 cm−1 and 1165 cm−1.