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Raman spectroscopic studies of the various phases of crystalline ammonium fluosilicate (NH4)2 SiF6

โœ Scribed by H. Poulet; J. P. Mathieu

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
259 KB
Volume
5
Category
Article
ISSN
0377-0486

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โœฆ Synopsis

Abstract

Raman spectra of oriented single crystals of (NH~4~)~2~SiF~6~ are reported for the temperature range 440โ€“20 K. The trigonal phase stable below 278 K undergoes a transition at 38.6 K. The changes in the spectra show that the symmetry does not remain trigonal, but give evidence for a lower symmetry.

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