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Titolo:
The Gibbs energy formulation of the alpha, beta, and gamma forms Of Mg2SiO4 using Grover, Getting and Kennedy's empirical relation between volume andbulk modulus
Autore:
Jacobs, MHG; Oonk, HAJ;
Indirizzi:
Univ Utrecht, Geodynam Res Inst, NL-3584 CD Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CD 3584 CD Utrecht, Netherlands Univ Utrecht, Debye Inst, NL-3584 CH Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CH 3584 CH Utrecht, Netherlands Univ Utrecht, Geodynam Res Inst, NL-3584 CH Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CH 3584 CH Utrecht, Netherlands
Titolo Testata:
PHYSICS AND CHEMISTRY OF MINERALS
fascicolo: 8, volume: 28, anno: 2001,
pagine: 572 - 585
SICI:
0342-1791(200109)28:8<572:TGEFOT>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
SINGLE-CRYSTAL FORSTERITE; X-RAY-DIFFRACTION; MODIFIED SPINEL BETA; MG-SI-O; HIGH-PRESSURE; ELASTIC PROPERTIES; THERMAL-PROPERTIES; MANTLE PRESSURES; VIBRATIONAL SPECTROSCOPY; THERMODYNAMIC PROPERTIES;
Keywords:
thermal expansivity; bulk modulus; sound velocity; equation of state; olivine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Jacobs, MHG Univ Utrecht, Geodynam Res Inst, Budapestlaan 4, NL-3584 CD Utrecht, Netherlands Univ Utrecht Budapestlaan 4 Utrecht Netherlands NL-3584CD ds
Citazione:
M.H.G. Jacobs e H.A.J. Oonk, "The Gibbs energy formulation of the alpha, beta, and gamma forms Of Mg2SiO4 using Grover, Getting and Kennedy's empirical relation between volume andbulk modulus", PHYS CHEM M, 28(8), 2001, pp. 572-585

Abstract

The empirical linear relation between volume and logarithm of bulk modulusof a material, discovered by Grover, Getting and Kennedy is taken as the basis fr our equation of state. Using the latest experimental information onthe adiabatic bulk modulus, the equation of state is applied to the three polymorphs of Mg2SiO4 to develop a consistent dataset of their thermodynamic properties in the temperature range of 200-2273 K and a pressure range of0.1 MPa-30 GPa. The results imply that the bulk sound velocity contrast (nu (beta) - nu (alpha))/nu (alpha) increases with temperature along the alpha-beta phase boundary and reaches the value 8.9% at 13.5 GPa. a pressure equivalent to 410 km depth in the Earth. The bulk sound velocity contrast (nu(gamma) - nu (beta))/nu (beta) decreases with temperature along the beta-gamma phase boundary and becomes less than 0.7% at temperatures and pressures equivalent to those associated with the 520-km seismic discontinuity in the Earth.

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Documento generato il 29/09/20 alle ore 23:58:33