Structural and Magnetic Phase Transitions in Minerals |
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Page 66
... pairs ( subject to periodic boundary conditions ) and then assigning energies Ɛier = ε ( A = B ) = ɛ ( B = A ) = ɛ ... pairs multiplied by their respective interaction parameters . Pair concentrations are approximated as products of site ...
... pairs ( subject to periodic boundary conditions ) and then assigning energies Ɛier = ε ( A = B ) = ɛ ( B = A ) = ɛ ... pairs multiplied by their respective interaction parameters . Pair concentrations are approximated as products of site ...
Page 69
... pair is in configuration ( Mg ) = ( A1 ) , then the ( M1 ) - [ M2 ] pairs can assume configuration ( Mg ) — [ Ca ] + ( A1 ) − [ Ca ] ( Fig . 7b ) or ( Mg ) − [ Na ] + ( A1 ) — [ Na ] ( Fig . 7c ) , but not 2 ( Mg ) — [ Ca ] or 2 ( A1 ) ...
... pair is in configuration ( Mg ) = ( A1 ) , then the ( M1 ) - [ M2 ] pairs can assume configuration ( Mg ) — [ Ca ] + ( A1 ) − [ Ca ] ( Fig . 7b ) or ( Mg ) − [ Na ] + ( A1 ) — [ Na ] ( Fig . 7c ) , but not 2 ( Mg ) — [ Ca ] or 2 ( A1 ) ...
Page 159
... pairs wins out below TNo2 and the Fe2 + ( B ) spins show long - range order . Magnetostriction Near TN , a coupling ... pairs with short metal - metal bonds are formed along the chains . The charge localization continues from 343 K down ...
... pairs wins out below TNo2 and the Fe2 + ( B ) spins show long - range order . Magnetostriction Near TN , a coupling ... pairs with short metal - metal bonds are formed along the chains . The charge localization continues from 343 K down ...
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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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