Structural and Magnetic Phase Transitions in Minerals |
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Page 24
Although Landau theory gives a good description of the behavior of a - quartz , the parameters of Eq . ( 1 ) must be deduced from experimental results . This is particularly the case for thermal effects such as the transition enthalpy ...
Although Landau theory gives a good description of the behavior of a - quartz , the parameters of Eq . ( 1 ) must be deduced from experimental results . This is particularly the case for thermal effects such as the transition enthalpy ...
Page 118
In solids , this will be decreased somewhat because of covalent bonding with the ligands to give C I 19 it B ( solid ) BB ( free ion ) where ... Using this value together with the freeion equality C = 3.7B gives 5B + 8C = 32,950 cm “ .
In solids , this will be decreased somewhat because of covalent bonding with the ligands to give C I 19 it B ( solid ) BB ( free ion ) where ... Using this value together with the freeion equality C = 3.7B gives 5B + 8C = 32,950 cm “ .
Page 123
This gives dSvib Coy d In V or , on integration , AS vib = Cy In ( V / V ) Hence , we can estimate the vibrational entropy change from the molar volumes of low - spin and high - spin FeO . At the high temperatures of the mantle , we can ...
This gives dSvib Coy d In V or , on integration , AS vib = Cy In ( V / V ) Hence , we can estimate the vibrational entropy change from the molar volumes of low - spin and high - spin FeO . At the high temperatures of the mantle , we can ...
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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 |
Common terms and phrases
antiferromagnetic appears applied approximation atoms axis Ballet behavior bond calculated cation Chem chemical cluster Coey components composition constant corresponding coupling critical crystal decreases density dependence described determined diffraction direction disordered Dolino effect electron energy equilibrium estimated et al exchange experimental experiments Fe2+ ferromagnetic field function Ghose give given heat ilvaite inc phase increases indicate interactions ions iron lattice layers Lindsley lower mantle magnetic magnetic order materials measurements Mineral mode Mössbauer natural neutron observed obtained occur octahedral olivines order parameter pairs perovskite phase diagrams phase transition Phys physical pigeonite polytypes positions possible potential predicted pressure properties pyroxenes quartz range respectively Salje sample shown shows silicates solid solution space group spin stability structure symmetry Table temperature theory thermodynamic tion transformation unit variation