Properties of SiO 2  in a high‐pressure fluorite structure phase | Zendy

Carlsson A. E. | Zendy; Ashcroft N. W. | Zendy; Williams A. R. | Zendy

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Properties of SiO 2 in a high‐pressure fluorite structure phase

Author(s) -

Carlsson A. E.,

Ashcroft N. W.,

Williams A. R.

Publication year - 1984

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl011i006p00617

Subject(s) - fluorite , equation of state , quartz , phase (matter) , phase transition , materials science , mineralogy , crystal structure , shock (circulatory) , volume (thermodynamics) , compression (physics) , bulk modulus , condensed matter physics , thermodynamics , geology , physics , chemistry , crystallography , composite material , medicine , quantum mechanics , metallurgy

The equation of state and volume‐dependent band gap are calculated for SiO 2 in the fluorite crystal structure. The equation of state is in considerable disagreement with recent shock magnetic compression results. Its form also suggests that if SiO 2 is present in the earth's core in uncombined form it can only be so in relatively small amounts. The band‐overlap transition occurs at a density four times that of quartz at zero pressure.

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