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 129
... SiO2 with the fluorite structure have been carried out by Hemley et al . ( 1985 ) and Bukowinski and Wolf ( 1986 ) . Their results indicate that the SiO2 - fluorite phase may be at least metastable provided the pressure is extremely ...
... SiO2 with the fluorite structure have been carried out by Hemley et al . ( 1985 ) and Bukowinski and Wolf ( 1986 ) . Their results indicate that the SiO2 - fluorite phase may be at least metastable provided the pressure is extremely ...
Page 137
... SiO2- rutile are compared in Fig . 5. The peaks for Si - O pair are definitely less sharp in Pa3 - SiO2 than in SiO2 - rutile , suggesting greater positional uncertainties of atoms in the former . This may be a sign of the fact that the ...
... SiO2- rutile are compared in Fig . 5. The peaks for Si - O pair are definitely less sharp in Pa3 - SiO2 than in SiO2 - rutile , suggesting greater positional uncertainties of atoms in the former . This may be a sign of the fact that the ...
Page 139
... SiO2 ( u = 0.333 ) has an energy minimum at a density of ca.4.6 g / cm3 which is about 7 % denser than the SiO2 - rutile . Acknowledgments We thank Yasuhiko Syono and Keiji Kusaba of Tohoku University for stimulating discussions on the ...
... SiO2 ( u = 0.333 ) has an energy minimum at a density of ca.4.6 g / cm3 which is about 7 % denser than the SiO2 - rutile . Acknowledgments We thank Yasuhiko Syono and Keiji Kusaba of Tohoku University for stimulating discussions on the ...
Contents
Preface | 1 |
Incommensurate Phase Transitions in Quartz and Berlinite | 17 |
Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |
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 |
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 Co₂SiO4 Coey components composition coupling crystal field crystal structure crystallographic decreases density disordered Dolino Earth Planet electron entropy equilibrium experimental Fe² Fe2+ Fe2SiO4 Fe³ feldspar ferromagnetic free energy Fuess Geophys Ghose grunerite high-spin ilvaite inc phase incommensurate phase interactions ions Jeanloz Landau theory lattice layers Lindsley long-range order low temperatures lower mantle LS transition M2 sites magnetic order Magnetic properties magnetic structure Matsui measurements MgSiO3 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 solid solutions space group spin glass ẞ phase susceptibility symmetry temperature dependence thermal expansion thermodynamic tion transformation X-ray zero pressure