绿松石的激光拉曼光谱研究

对湖北、安徽地区绿松石进行了激光拉曼光谱测试分析。结果表明，绿松石中H₂O，OH-及PO3-₄的基团振动是导致其激光拉曼光谱形成的主要原因。3 510～3 440 cm-1的谱峰是由ν(OH)伸缩振动所致，其中ν(OH)振动导致的强拉曼特征谱峰在3 470 cm-1附近，ν(H₂O)伸缩振动致拉曼谱峰位于3 290～3 070 cm-1附近的较为宽缓的弱谱峰处；由ν₃(PO₄)伸缩振动致强拉曼特征谱峰在1 200～1 030 cm-1之间，其中ν₃(PO₄)振动导致的强拉曼特征谱峰在1 039 cm-1附近，ν₄(PO₄)弯曲振动位于650～540 cm-1范围，ν₂(PO₄)的弯曲振动谱峰位于500～410 cm-1处；不同产地、不同结晶类型的绿松石表现出的拉曼谱峰特征基本一致。

Raman Spectrum Study on Turquoise

The Raman spectrum has been employed to discuss the explanation of the structure of water and the vibration of PO3-₄] tetrahedron of the turquoise from Hubei and Anhui province. The Raman spectra are resulted mainly from vibrations of water, hydroxyl units and PO3-₄] tetrahedron of turquoise. The 3 510-3 440 cm-1 bands with the main Raman spectra peak at 3 470 cm-1 were assigned to the ν(OH) stretching vibrations and the 3 290-3 070 cm-1 bands assigned to the ν(H₂O) stretching vibrations. The bands observed at 1 200-1 030 cm-1 with the strong peak at 1 039 cm-1 were assigned to ν₃(PO₄) antisymmetric stretching vibrations. And the Raman spectra peaks at 650-540 cm-1 and 500-410 cm-1 were attributed to the ν₄ and ν₂ bending vibrations of PO3-₄] tetrahedron, respectively. The spectra of the turquoise from different localities are basically similar and subtly different.