PHASE DIAGRAMS OF CALCIUM AND STRONTIUM AT HIGH PRESSURES
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
The melting temperatures for both Ca and Sr increase rapidly with pressure, reaching nearly 1200 deg C at 40 kbar. The only solid-solid transition in Ca below 35 kbar is that between the body-centered cubic and face-centered cubic polymorphs; the slope of the phase boundary is about 3.3 deg C/ kbar. The phase boundary between tue homologous Sr polymorphs has an initial slope of about --10 deg C/kbar becoming much steeper at higher pressures. Also, the hysteresis associated witu the transition is a function of pressure and becomes very large above 22 kbar. The face-centered cubic Sr shows a large increase in resistance with pressure and a negative temperature coefficient of resistance prior to the polymorphic transition. The resistance discontinuity for the fcc-bcc transformation is a sharp increase at lower pressures, which progressively decreases in magnitude and sharpness and reverses sign at the higher pressures. (auth)
- Research Organization:
- Univ. of California, Los Angeles
- NSA Number:
- NSA-18-000623
- OSTI ID:
- 4165654
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 132; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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