Structural and Magnetic Phase Transitions in MineralsThis volume in Advances in Physical Geochemistry presents the latest synthesis of theory and experimental data pertaining to structural and magnetic phase transitions in a variety of geochemically important minerals. The book is the first to cover the impact of this rapidly progressing area of solid state physics in earth sciences and reflects its growing significance for mineralogy and petrology. |
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Page 94
The distortion increases with compression , and the potential wells deepen . Restricting our discussion to ionic models , this can be understood in terms of the relative compressibility of Si - O and Mg - O bonds , as illustrated in Fig ...
The distortion increases with compression , and the potential wells deepen . Restricting our discussion to ionic models , this can be understood in terms of the relative compressibility of Si - O and Mg - O bonds , as illustrated in Fig ...
Page 99
The symmetry of the lattice changes from orthorhombic 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 ...
The symmetry of the lattice changes from orthorhombic 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 ...
Page 144
( 1984 ) . degree of charge localization increases with decreasing temperature ( Ghose et al . , 1984b , 1985 ) ( Table 1 ) , resulting in double chains of alternating Fe2 + and Fe3 + ions parallel to the c axis .
( 1984 ) . degree of charge localization increases with decreasing temperature ( Ghose et al . , 1984b , 1985 ) ( Table 1 ) , resulting in double chains of alternating Fe2 + and Fe3 + ions parallel to the c axis .
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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+ Fe3+ 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