Structural and Magnetic Phase Transitions in Minerals |
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Page 97
... cubic lattice : At approximately 1000 K , softening of modes that are associated with librations of the octahedra around the y axis ( M2 and neighboring modes in the cubic lattice ) leads to a transition to the tetragonal perovskite ...
... cubic lattice : At approximately 1000 K , softening of modes that are associated with librations of the octahedra around the y axis ( M2 and neighboring modes in the cubic lattice ) leads to a transition to the tetragonal perovskite ...
Page 101
... cubic CaSiO , perovskite is dynamically stable at low pressures , in apparent con- tradiction with the observation that it is not quenchable ( Ringwood and Major , 1971 ) . However , it is possible that the cubic perovskite phase is not ...
... cubic CaSiO , perovskite is dynamically stable at low pressures , in apparent con- tradiction with the observation that it is not quenchable ( Ringwood and Major , 1971 ) . However , it is possible that the cubic perovskite phase is not ...
Page 138
... cubic polymorph of SnO2 that was synthesized by compac- tion of SnO2 - rutile ( cassiterite ) up to 25 GPa . He considered the cubic phase to be of the fluorite type , but a diffraction peak with index ( 201 ) obviously violates the ...
... cubic polymorph of SnO2 that was synthesized by compac- tion of SnO2 - rutile ( cassiterite ) up to 25 GPa . He considered the cubic phase to be of the fluorite type , but a diffraction peak with index ( 201 ) obviously violates the ...
Contents
Incommensurate Phase Transitions in Quartz and Berlinite | 17 |
Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |
Multicritical Phase Relations in Minerals | 60 |
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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