Structural and Magnetic Phase Transitions in Minerals |
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Page 92
... perovskite . Hence , it remains difficult to constrain the relative proportion of perovskite and magnesiowüstite in the lower mantle . As a consequence of the lack of sufficient mineralogical constraints , there is a lack of consensus ...
... perovskite . Hence , it remains difficult to constrain the relative proportion of perovskite and magnesiowüstite in the lower mantle . As a consequence of the lack of sufficient mineralogical constraints , there is a lack of consensus ...
Page 99
... perovskite to tetragonal perovskite at approximately 950 K and further changes to cubic perovskite at about 1500 K. Pressure increases the " critical temperatures " at a rate that is consistent with those found experimentally in other ...
... perovskite to tetragonal perovskite at approximately 950 K and further changes to cubic perovskite at about 1500 K. Pressure increases the " critical temperatures " at a rate that is consistent with those found experimentally in other ...
Page 111
... perovskite to over 100 gigapascals . Science 235 , 668-670 . Knittle , E. , Jeanloz , R. , and Smith , G.L. ( 1986 ) Thermal expansion of silicate perovskite and stratification of the earth's mantle . Nature ( London ) 319 , 214–216 ...
... perovskite to over 100 gigapascals . Science 235 , 668-670 . Knittle , E. , Jeanloz , R. , and Smith , G.L. ( 1986 ) Thermal expansion of silicate perovskite and stratification of the earth's mantle . Nature ( London ) 319 , 214–216 ...
Contents
Incommensurate Phase Transitions in Quartz and Berlinite | 17 |
Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |
Multicritical Phase Relations in Minerals | 60 |
Copyright | |
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Other editions - View all
Structural and Magnetic Phase Transitions in Minerals S. Ghose,J.M.D. Coey,E. Salje Limited preview - 2012 |
Structural and Magnetic Phase Transitions in Minerals S. Ghose,J.M.D. Coey,E. Salje Snippet view - 1988 |
Structural and Magnetic Phase Transitions in Minerals S. Ghose,J.M.D. Coey,E. Salje Snippet view - 1988 |
Common terms and phrases
a-ẞ transition anisotropy ANNNI model antiferromagnetic approximation atoms axis Bachheimer Ballet behavior berlinite Bukowinski calculated canting Chem chemical Co₂SiO4 Coey components composition coupling crystal field crystal structure crystallographic Davidson decreases density Di-En disordered Dolino Earth Planet electron equilibrium experimental Fe² Fe2+ Fe2SiO4 Fe³ feldspar ferromagnetic free energy Geophys Ghose grunerite high pressure high-spin ilvaite inc phase incommensurate phase interactions ions Jeanloz Landau theory lattice layers Lindsley low temperatures lower mantle LS transition M2 sites magnetic order magnetic phase transitions magnetic properties magnetic structure Matsui measurements MgSiO3 Mineral Mn2SiO4 mode Mössbauer neutron diffraction observed octahedral olivines order parameter orthopyroxene orthorhombic pairs perovskite phase diagrams phase transition Phys polytypes polytypic phases predicted pyroxenes quartz Salje sample shown in Fig silicates SiO2 solid solution space group spin glass ẞ phase susceptibility symmetry temperature dependence thermal expansion thermodynamic tion transformation X-ray zero pressure