GASEOUS-DIFFUSION COEFFICIENTS OF ZNSE IN ARGON AND HELIUM AT 1140-1280-K AND 70-100-MBAR

Authors
SCHONHERR E FREIBERG M HARTMANN H
Citation
E. Schonherr et al., GASEOUS-DIFFUSION COEFFICIENTS OF ZNSE IN ARGON AND HELIUM AT 1140-1280-K AND 70-100-MBAR, Berichte der Bunsengesellschaft fur Physikalische Chemie, 100(4), 1996, pp. 440-444
Citations number
20
Categorie Soggetti
Chemistry Physical
Journal title
Berichte der Bunsengesellschaft fur Physikalische Chemie
ISSN journal
00059021 → ACNP
Volume
100
Issue
4
Year of publication
1996
Pages
440 - 444
Database
ISI
SICI code
0005-9021(1996)100:4<440:GCOZIA>2.0.ZU;2-C
Abstract
The diffusion of subliming ZnSe in argon and helium gas has been inves tigated by a modified entrainment method with a flowing gas at a reduc ed pressure between 70 and 100 mbar. From the weight loss measurements an effective diffusion coefficient results for the (Zn+0.5 Se-2, Ar) system as 0.0828 (T/273)(1.47) cm(2)/s and for the (Zn+0.5 Se-2, He) s ystem as 0.177 (T/273)(1.88) cm(2)/s between 1140 and 1280 K. With a s implified gas collision theory, rigid sphere diameters are estimated a s 4.11x10(-8) cm for Zn and 5.97x10(-8) cm for Se-2.