Article ID Journal Published Year Pages File Type
1794639 Journal of Crystal Growth 2008 7 Pages PDF
Abstract
Crystals of the cationic clathrate Si46−2xP2xTex can be grown via chemical vapour transport by adding tellurium tetrachloride. The transport proceeds in the temperature gradient T1=923 K→T2=1003 K and with increasing temperature under reversion of the transport direction T2=1173 K→T1=1073 K. By means of the thermodynamic modelling of solid state-gas phase equilibria, the transport mechanism for both directions was clarified; in the direction T1→T2 (T1T1) SiCl4(g) becomes active. Using the modelling the composition of the crystals Si46−2xP2xTex can be predicted depending on the experimental conditions, i.e. the temperature range, the direction of temperature gradient and the composition of the starting material.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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