✦ LIBER ✦

Raman spectrum of NH4ReO4 at high pressure

✍ Scribed by D. D. Klug; P. G. Sim; R. J. C. Brown

Publisher: John Wiley and Sons
Year: 1982
Tongue: English
Weight: 255 KB
Volume: 13
Category: Article
ISSN: 0377-0486
DOI: 10.1002/jrs.1250130110

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✦ Synopsis

The pressure dependences at room temperature of the translational lattice modes and of the u2 and u., internal bending modes of the ReO; ion in solid NH,ReO, are reported. There is no evidence of any phase transition up to a pressure of 15 kilobar. The pressure coefficients of the translational modes are 2.0 cm-' GPa-' and 3.0 cm-' GPa-' for the B, and E, modes respectively. The pressure coefficients of the bending modes are 1.0 cm-' GPa-' and 5.4 cm-' GPa-' for the B, and A, components of u2, and 4.1 cm-' GPa-lfor the overlapped 9, and E, components of v4.

The symmetry assignments of the low frequency lines in the spectrum were checked by means of polarized Raman spectra of a single crystal. The previous assignments are correct.

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