Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1794639 | Journal of Crystal Growth | 2008 | 7 Pages |
Abstract
Crystals of the cationic clathrate Si46â2xP2xTex can be grown via chemical vapour transport by adding tellurium tetrachloride. The transport proceeds in the temperature gradient T1=923Â KâT2=1003Â K and with increasing temperature under reversion of the transport direction T2=1173Â KâT1=1073Â K. By means of the thermodynamic modelling of solid state-gas phase equilibria, the transport mechanism for both directions was clarified; in the direction T1âT2 (T1T1) SiCl4(g) becomes active. Using the modelling the composition of the crystals Si46â2xP2xTex 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.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Frauke Philipp, Peer Schmidt,