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Vibrational spectroscopy at high pressures: 44—thallous carbonate

✍ Scribed by D. M. Adams; P. D. Hatton; I. D. Taylor


Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
431 KB
Volume
14
Category
Article
ISSN
0377-0486

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✦ Synopsis


Raman spectra of thallous carbonate have been studied to c. 52 kbar and mid-IR spectra to 36 kbar. Details of the assignment have also been established using single-crystal IR reflectance and Raman spectroscopy. Phase transitions were found near 13 and 38 kbar on the basis of the Raman evidence, thus supporting the earlier conclusions of Meisalo and Kalliomaki based on x-ray powder and optical results. Analysis of possible space group relations between phases I11 (ambient) and IV showed that IV must be orthorhombic and adopt one of the Dih groups, where n = 17,19,21,25 or 28. Structural relationships between the phases are discussed.


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