Single crystal raman studies of pyrite-type RuS2, RuSe2, OsS2, OsSe2, PtP2, and PtAs2 |
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Authors: | B. Müller H. D. Lutz |
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Affiliation: | 1. Universit?t Siegen, Anorganische Chemie I, W-5900, Siegen, Germany
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Abstract: | Single crystal Raman spectra of pyrite-type RuS2, RuSe2, OsS2, OsSe2, PtP2, and PtAs2 are presented and discussed with reference to the energies of the X-X stretching modes x-x (Ag, Fg) and the X2 librations (E, 2Fg). The main results obtained are (i) strong Raman resonance effects, (ii) different sequences for x-x (Ag) and (Eg), i.e., for PtP2 and PtAs2 and for OsS2, owing to the interplay of intraionic and interionic lattice forces, (iii) greater strengths for the intraionic P-P and As-As bonds compared to the S-S and Se-Se bonds, respectively, and (iv) a strong influegnce of the metal ions on the strength of the X-X bonds.This is contribution LXI of a series of papers on lattice vibration spectra |
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