Details

Autor(en) / Beteiligte

• Szymborska-Malek, K
• Maczka, M
• da Silva, TAlmeida
• Paraguassu, W
• Majchrowski, A

Titel

Lattice dynamics and high-pressure Raman scattering studies of CoTeMoO sub(6) crystal

Ist Teil von

• Vibrational spectroscopy, 2016-05, Vol.84, p.153-158

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• We have performed lattice dynamics calculations for CoTeMoO sub(6) telluromolybdate and proposed assignment of modes to respective vibrations of atoms in the unit cell. We have also performed pressure-dependent Raman scattering studies that revealed unusual negative pressure dependence of the highest wavenumber modes. We provide explanation of this behavior based on strongly layered nature of CoTeMoO sub(6) crystal. High-pressure data also indicate weak compressibility of the TeO sub(4) groups associated with large changes in the Mosingle bond Osingle bond Te bridges. The spectra remain qualitatively the same up to 6.3 GPa but some very subtle changes in the spectra have been observed near 2.6-3.0 GPa that might indicate onset of a very subtle structural transformation in the studied crystal.