Journal
PHASE TRANSITIONS
Volume 83, Issue 6, Pages 404-418Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/01411594.2010.491433
Keywords
rare-earth compounds; high-pressure phase transition; equation of state; elastic properties; thermophysical properties
Categories
Funding
- DST, New Delhi
Ask authors/readers for more resources
Thorium pnictides crystallise in Fm3m space group at ambient condition and transform to Pm3m space group under pressure. We have investigated the phase transition, elastic and thermophysical properties of thorium pnictides by means of a modified charge-transfer potential model. This model incorporates Coulomb effect modified by Coulomb screening effect due to the delocalisation of the electron of Th-ion (charge-transfer) and covalency along with repulsion extended up to next-nearest neighbours. Present model is capable of explaining the Cauchy's discrepancy correctly. The calculated values of the phase-transition pressure (PT = 70.6, 29.6, 24.3 and 11.5 GPa) and relative volume collapse (6.37, 11.22, 9.92 and 9.27%) for ThN, ThP, ThAs and ThSb, respectively, are in good agreement with the experimental data. The equation of state has been plotted to obtain phase diagram.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available