Temperature induced symmetry transformation in the Th 3P 4 type compounds La 3S 4, La 3Se 4, Pr 3S 4 and Pr 3Se 4

From X-ray powder diffraction experiments the Th 3P 4 type sulfides and selenides of La and Pr have been shown to undergo a cubic to tetragonal phase transformation with decreasing temperature. The corresponding tellurides show no distortion down to 4.2°K. These results cast some doubt on a possible...

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Bibliographic Details
Published inJournal of solid state chemistry Vol. 15; no. 2; pp. 203 - 207
Main Authors Dernier, P.D., Bucher, E., Longinotti, L.D.
Format Journal Article
LanguageEnglish
Published Elsevier Inc 1975
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Summary:From X-ray powder diffraction experiments the Th 3P 4 type sulfides and selenides of La and Pr have been shown to undergo a cubic to tetragonal phase transformation with decreasing temperature. The corresponding tellurides show no distortion down to 4.2°K. These results cast some doubt on a possible charge order-disorder mechanism underlying the transition.
ISSN:0022-4596
1095-726X
DOI:10.1016/0022-4596(75)90247-9