Kristallstruktur und Schwingungsspektrum des Praseodym-ortho-Thiophosphates PrPS4 / Crystal Structure and Vibrational Spectrum of PrPS4
Open Access
- 1 February 1984
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 39 (2) , 190-194
- https://doi.org/10.1515/zna-1984-0213
Abstract
PrPS4 crystallizes in the tetragonal system, space group I41/acd with the lattice constants a= 1091.4(5) pm. c = 1936.1(8) pm. In the structure there are slightly distorted PS3- 4 tetrahedra as discrete structural units, placed along the b-axis. Far infrared, infrared and Raman spectra of this compound have been recorded. The observed frequencies are assigned rangewise by factor group analysis and the Td-D4h-correlation. The Raman data of rare-earth ortho thiophosphates LnPS4 with Ln = La, Ce, Pr, Nd, Sm, Tb and Tm are given in a line diagram.Keywords
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