Structural and Magnetic Phase Transitions in Minerals |
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Page 24
... gives a good description of the behavior of a - quartz , the parameters of Eq . ( 1 ) must be deduced from experimental ... give useful information in a well - chosen geological context ( Smykatz - Kloss , 1970 ) . Another consequence of ...
... gives a good description of the behavior of a - quartz , the parameters of Eq . ( 1 ) must be deduced from experimental ... give useful information in a well - chosen geological context ( Smykatz - Kloss , 1970 ) . Another consequence of ...
Page 118
... give = B ( solid ) BB ( free ion ) where ẞ is the " nephalauxetic ratio . " For divalent transition metal oxides and sili- cates a reasonable value for ẞ is about 0.9 . Using this value together with the free- ion equality C = 3.7B gives ...
... give = B ( solid ) BB ( free ion ) where ẞ is the " nephalauxetic ratio . " For divalent transition metal oxides and sili- cates a reasonable value for ẞ is about 0.9 . Using this value together with the free- ion equality C = 3.7B gives ...
Page 123
... gives or , on integration , dSvib = C1y d In V ASvib = C1y ln ( V2 / V1 ) Hence , we can estimate the vibrational ... give an uncertainty on the order of 10 GPa for the transi- tion pressure . An error in AV of 50 % ( which is quite ...
... gives or , on integration , dSvib = C1y d In V ASvib = C1y ln ( V2 / V1 ) Hence , we can estimate the vibrational ... give an uncertainty on the order of 10 GPa for the transi- tion pressure . An error in AV of 50 % ( which is quite ...
Contents
Incommensurate Phase Transitions in Quartz and Berlinite | 17 |
Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |
Multicritical Phase Relations in Minerals | 60 |
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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