Postshock temperatures in silica

Journal Article · Fri Jun 10 00:00:00 EDT 1988 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JB093iB06p06477· OSTI ID:6935606

Boslough, M B

Experimental postshock temperatures for crystalline quartz released from shock states between 86 and 127 GPa and for fuset silica released from 59 to 73 GPa have been determined using previously measured spectral radiance data. The temperatures range from 3660 to 4150 K and are consistent with the interpretation based on shock temperature measurements, that the Hugoniot of SiO/sub 2/ crosses the phase boundary between stishovite and liquid. The new postshock temperatures were used to determine the Grueneisen parameter of liquid silica at high pressures and temperatures and the specific volume of the release state (..gamma../V = 3.5 Mg/m/sup 3/ and F/sub r/ = 0.266 m/sup 3//Mg, respectively), although there is some ambiguity as to whether this volume corresponds to a partial or total release state. To show the validity of these postshock temperatures, a radiative transport model was extended to times after free surface arrival of the shock wave. copyright American Geophysical Union 1988

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico
• OSTI ID: 6935606
• Journal Information: J. Geophys. Res.; (United States), Vol. 93:B6
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
SILICON OXIDES
SHOCK WAVES
CHEMICAL COMPOSITION
EARTH MANTLE
EQUATIONS OF STATE
QUARTZ
SEISMIC SOURCES
ULTRAHIGH TEMPERATURE
VERY HIGH PRESSURE
VERY HIGH TEMPERATURE
CHALCOGENIDES
EQUATIONS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)