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The Sublimation Kinetics of GeSe Single Crystals
Author(s) -
Irene E. A.,
Wiedemeier H.
Publication year - 1975
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.19754110213
Subject(s) - sublimation (psychology) , vaporization , atmospheric temperature range , materials science , kinetics , enthalpy , adsorption , thermodynamics , analytical chemistry (journal) , chemistry , psychology , physics , chromatography , quantum mechanics , psychotherapist
The sublimation kinetics of (001) oriented GeSe single crystal platelets was studied by means of high temperature mass spectroscopy, quantitative vacuum microbalance techniques and hot stage optical microscopy. Solid GeSe sublimes under non‐equilibrium conditions according to the reaction GeSe(s) → GeSe(g). The activational enthalpy and entropy for the mean experimental temperature 563°K are ΔH 563 * = 32.3 kcal/mol and ΔS 563 * = 19.1 eu. The vaporization coefficient α is less than unity for the temperature range studied and α decreases with increasing temperature. The combined experimental data are correlated by means of a multi‐step surface adsorption mechanism.