Frost Ray L, Dickfos Marilla J, Keeffe Eloise C
Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Jan;71(5):1663-6. doi: 10.1016/j.saa.2008.06.014. Epub 2008 Jun 27.
Raman spectroscopy has been used to study the tellurite minerals spiroffite and carlfriesite, which are minerals of formula type A(2)(X(3)O(8)) where A is Ca(2+) for the mineral carlfriesite and is Zn(2+) and Mn(2+) for the mineral spiroffite. Raman bands for spiroffite observed at 721 and 743 cm(-1), and 650 cm(-1) are attributed to the nu(1) (Te(3)O(8))(2-) symmetric stretching mode and the nu(3) (Te(3)O(8))(2-) antisymmetric stretching modes, respectively. A second spiroffite mineral sample provided a Raman spectrum with bands at 727 cm(-1) assigned to the nu(1) (Te(3)O(8))(2-) symmetric stretching modes and the band at 640cm(-1) accounted for by the nu(3) (Te(3)O(8))(2-) antisymmetric stretching mode. The Raman spectrum of carlfriesite showed an intense band at 721 cm(-1). Raman bands for spiroffite, observed at (346, 394) and 466 cm(-1) are assigned to the (Te(3)O(8))(2-)nu(2) (A(1)) bending mode and nu(4) (E) bending modes. The Raman spectroscopy of the minerals carlfriesite and spiroffite are difficult because of the presence of impurities and other diagenetically related tellurite minerals.
拉曼光谱已被用于研究碲酸盐矿物螺碲钙石和卡尔弗利石，它们是化学式为A₂(X₃O₈)的矿物，其中对于卡尔弗利石来说A是Ca²⁺，对于螺碲钙石来说A是Zn²⁺和Mn²⁺。在721 cm⁻¹和743 cm⁻¹以及650 cm⁻¹处观察到的螺碲钙石的拉曼谱带分别归属于(Te₃O₈)²⁻的ν₁对称伸缩振动模式和ν₃反对称伸缩振动模式。另一个螺碲钙石矿物样品提供的拉曼光谱中，727 cm⁻¹处的谱带归属于(Te₃O₈)²⁻的ν₁对称伸缩振动模式，640 cm⁻¹处的谱带由(Te₃O₈)²⁻的ν₃反对称伸缩振动模式引起。卡尔弗利石的拉曼光谱在721 cm⁻¹处显示出一条强谱带。在(346、394) cm⁻¹和466 cm⁻¹处观察到的螺碲钙石的拉曼谱带归属于(Te₃O₈)²⁻的ν₂(A₁)弯曲振动模式和ν₄(E)弯曲振动模式。由于存在杂质和其他成岩相关的碲酸盐矿物，卡尔弗利石和螺碲钙石矿物的拉曼光谱分析存在困难。
