Инд. авторы: Sokolova T.S., Dorogokupets P.I., Litasov K.D.
Заглавие: Self-consistent pressure scales based on the equations of state for ruby, diamond, MgO, B2-NaCl, as well as Au, Pt, and other metals to 4 Mbar and 3000 K
Библ. ссылка: Sokolova T.S., Dorogokupets P.I., Litasov K.D. Self-consistent pressure scales based on the equations of state for ruby, diamond, MgO, B2-NaCl, as well as Au, Pt, and other metals to 4 Mbar and 3000 K // Russian Geology and Geophysics. - 2013. - Vol.54. - Iss. 2. - P.181-199. - ISSN 1068-7971. - EISSN 1878-030X.
Внешние системы: DOI: 10.1016/j.rgg.2013.01.005; SCOPUS: 2-s2.0-84873251233; WoS: 000314877200005;
Реферат: eng: Based on the modified formalism of Dorogokupets and Oganov (2007), we calculated the equation of state for diamond, MgO, Ag, Al, Au, Cu, Mo, Nb, Pt, Ta, and W by simultaneous optimization of the data of shock-wave experiments and ultrasonic, X-ray diffraction, dilatometric, and thermochemical measurements in the temperature range from similar to 100 K to the melting points and pressures of up to several Mbar, depending on the material. The obtained room-temperature isotherms were adjusted with a shift of the R1 luminescence line of ruby, which was measured simultaneously with the unit cell parameters of metals in the helium and argon pressure media. The new ruby scale is expressed as P(GPa) = 1870.Delta lambda/lambda(0)(1 + 6.Delta lambda/lambda(0)). It can be used for correction of room-pressure isotherms of metals, diamond, and periclase. New simultaneous measurements of the volumes of Au, Pt, MgO, and B2-NaCl were used for interrelated test of obtained equations of state and calculation of the room-pressure isotherm for B2-NaCl. Therefore, the constructed equations of state for nine metals, diamond, periclase, and B2-NaCl can be considered self-consistent and consistent with the ruby scale and are close to a thermodynamic equilibrium. The calculated PVT relations can be used as self-consistent pressure scales in the study of the PVT properties of minerals using diamond anvil cell in a wide range of temperatures and pressures. (C) 2013, V. S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B. V. All rights reserved.
Ключевые слова: ruby pressure scale; diamond; Ag; Al; Au; Cu; Mo; BRILLOUIN-SCATTERING; THERMOELASTIC PROPERTIES; THERMAL-EXPANSION; ELASTIC-CONSTANTS; equations of state; HIGH-TEMPERATURE; OF-STATE; SIMULTANEOUS VOLUME MEASUREMENTS; SINGLE-CRYSTAL MGO; X-RAY-DIFFRACTION; B2-NaCl; MgO; W; Ta; Pt; Nb; PETROLOGICAL INTEREST; pressure scales;
Издано: 2013
Физ. характеристика: с.181-199