Structural and Magnetic Phase Transitions in MineralsS. Ghose, J.M.D. Coey, E. Salje This 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 19
... atomic level ( Smolenskii , 1984 ) . In some cases , the high - temperature phase is not a perfectly periodic structure but some atoms can be distributed randomly between symmetry - related positions . At the atomic scale the structure ...
... atomic level ( Smolenskii , 1984 ) . In some cases , the high - temperature phase is not a perfectly periodic structure but some atoms can be distributed randomly between symmetry - related positions . At the atomic scale the structure ...
Page 20
... atomic positions : a silicon atom is at ( 12,0,0 ) and an oxygen atom is at ( x , x / 2 ,, 1/6 ) with x = 0.414 . The positions of the other atoms can be obtained by the symmetry operations of quartz , namely a sixfold screw axis along ...
... atomic positions : a silicon atom is at ( 12,0,0 ) and an oxygen atom is at ( x , x / 2 ,, 1/6 ) with x = 0.414 . The positions of the other atoms can be obtained by the symmetry operations of quartz , namely a sixfold screw axis along ...
Page 152
... atoms so that each Fe atom has a formal valence > 0.10 30 K -1 K ( emu / mole ) 152 S. Ghose.
... atoms so that each Fe atom has a formal valence > 0.10 30 K -1 K ( emu / mole ) 152 S. Ghose.
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 |
Common terms and phrases
a-ß transition anisotropy ANNNI model antiferromagnetic atoms axis Bachheimer Ballet behavior berlinite Bukowinski calculated canting cation distributions Chem chemical cluster Coey components composition coupling crystal field crystal structure crystallographic Davidson decreases density disordered Dolino Earth Planet electron equilibrium experimental Fe2+ and Fe3+ Fe2SiO4 feldspar ferromagnetic free energy Geophys Ghose grunerite high-spin ilvaite inc phase incommensurate phase interactions Jeanloz Landau theory lattice layers Lindsley long-range order low temperatures low-spin FeO lower mantle LS transition M2 sites magnetic order magnetic properties magnetic structure Matsui measurements MgSiO3 MgSiOz perovskite Mineral Mn2SiO4 Mössbauer neutron diffraction observed octahedral olivines orbital order parameter orthopyroxene orthorhombic oxides pairs perovskite phase diagrams phase transition Phys polytypes polytypic phases predicted pyroxenes quartz Salje sample shown in Fig silicates SiO2 SiO4 solid solutions space group spin glass susceptibility symmetry temperature dependence thermal expansion thermodynamic tion transformation X-ray zero pressure