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High‐pressure X‐ray diffraction study of ternary and non‐stoichiometric PbTe and PbSe crystals
Author(s) -
Ovsyannikov Sergey V.,
Shchennikov Vladimir V.,
Manakov Andrey Y.,
Likhacheva Anna Y.,
Berger Ivan F.,
Ancharov Alexey I.,
Sheromov Mikhail A.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200672565
Subject(s) - orthorhombic crystal system , stoichiometry , ternary operation , diffraction , phase (matter) , crystallography , materials science , high pressure , x ray crystallography , analytical chemistry (journal) , phase diagram , chemistry , crystal structure , thermodynamics , optics , physics , chromatography , computer science , programming language , organic chemistry
The paper reports the pressure‐induced phase transitions observed in ternary PbTe and PbSe compounds (Pb 1– x Sn x Te, Pb 1– x Mn x Te, Pb 1– x Sn x Se) and non‐stoichiometric PbTe ones (Pb 0.55 Te 0.45 , Pb 0.45 Te 0.55 ) at room temperature in the range of 0 to14 GPa by means of angle‐dispersive X‐ray diffraction (ADXRD). The structure of the intermediate high‐pressure phase appearing above ∼6 GPa for all PbTe‐based compounds was established to be Pnma (orthorhombic), like in binary PbTe. The patterns of the intermediate high‐pressure phase of Pb 1– x Sn x Se ( x = 0.125) were found to correspond entirely neither to GeS nor to orthorhombic Pnma, but the calculated reflections for GeS type were closer to the experimental ones. A model of the phase transformations is discussed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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