The Thermochemical Behaviour of Te 8 O 10 (PO 4 ) 4  and its Use for Phosphide Telluride Synthesis | Zendy

Schmidt Peer | Zendy; Dallmann Hannelore | Zendy; Kadner Gudrun | Zendy; Krug Jutta | Zendy; Philipp Frauke | Zendy; Teske Klaus | Zendy

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The Thermochemical Behaviour of Te 8 O 10 (PO 4 ) 4 and its Use for Phosphide Telluride Synthesis

Author(s) -

Schmidt Peer,

Dallmann Hannelore,

Kadner Gudrun,

Krug Jutta,

Philipp Frauke,

Teske Klaus

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.200900350

Subject(s) - phosphide , telluride , calorimetry , differential scanning calorimetry , tellurium , standard enthalpy of formation , analytical chemistry (journal) , oxide , chemistry , thermal decomposition , decomposition , materials science , mineralogy , inorganic chemistry , thermodynamics , metallurgy , metal , organic chemistry , physics

The tellurium oxide phosphate Te 8 O 10 (PO 4 ) 4 was synthesised by thermal decomposition of Te 2 O 3 HPO 4 at temperatures above 400 °C. Te 8 O 10 (PO 4 ) 4 melts at 570 °C and evaporates at 820 °C. The thermodynamic standard data were determined by solution calorimetry and differential scanning calorimetry and were optimised by thermodynamic modelling of the binary system TeO 2 /P 2 O 5 : Δ H {}^0_298 [Te 8 O 10 (PO 4 ) 4 ] =–5844(2) kJ · mol –1 ; S {}^0_298 [Te 8 O 10 (PO 4 ) 4 ] = 823.3 J · mol –1 · K –1 . The phase relations in quaternary systems M /P/Te/O ( M = Ti, Zr, Ce) were calculated and optimised synthesis parameters for phosphide tellurides were derived.

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