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Phosphidtelluriden auf der Spur: Zum System Ce/Te/P. The Trace to Phosphide Tellurides: The System Ce/Te/P
Author(s) -
Philipp Frauke,
Pinkert Katja,
Schmidt Peer
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200801396
Subject(s) - phosphide , cerium , ternary operation , ternary numeral system , phase diagram , indium phosphide , materials science , thermal decomposition , chemistry , phase (matter) , analytical chemistry (journal) , inorganic chemistry , metallurgy , metal , organic chemistry , optoelectronics , computer science , programming language , gallium arsenide
The cerium phosphide tellurides Ce 3 Te 4– x P x ( x ≤ 1), CeTe 2– x P x ( x ≈ 0.35–0.55) and CeTe 2– y P y ( y ≥ 1) have been synthesised from the elements or from oxides in a thermite‐type reaction. Both ways have been optimised by consideration of the thermodynamic behaviour of the compounds. Hence the investigation of phase equilibria in the ternary system Ce/Te/P and of the thermal decomposition of ternary phases was necessary. This investigation was performed by using different experimental approaches as total‐pressure measurements and thermal analysis. It was shown that the cerium phosphide tellurides decompose in consecutive steps into CeTe (s) and gaseous phosphorus, [P 4(g) ]. The results were supported and further analysed by thermodynamic modelling of the ternary system; the computed phase diagrams of the systems Ce/Te and Ce/Te/P are presented.