Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1234950 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2009 | 4 Pages |
Abstract
Raman spectroscopy has been used to study the tellurite minerals spiroffite and carlfriesite, which are minerals of formula type A2(X3O8) where A is Ca2+ for the mineral carlfriesite and is Zn2+ and Mn2+ for the mineral spiroffite. Raman bands for spiroffite observed at 721 and 743 cmâ1, and 650 cmâ1 are attributed to the ν1 (Te3O8)2â symmetric stretching mode and the ν3 (Te3O8)2â antisymmetric stretching modes, respectively. A second spiroffite mineral sample provided a Raman spectrum with bands at 727 cmâ1 assigned to the ν1 (Te3O8)2â symmetric stretching modes and the band at 640 cmâ1 accounted for by the ν3 (Te3O8)2â antisymmetric stretching mode. The Raman spectrum of carlfriesite showed an intense band at 721 cmâ1. Raman bands for spiroffite, observed at (346, 394) and 466 cmâ1 are assigned to the (Te3O8)2âν2 (A1) bending mode and ν4 (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.
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ray L. Frost, Marilla J. Dickfos, Eloise C. Keeffe,