Structural and Magnetic Phase Transitions in Minerals |
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Page 46
... constant bulk composition , P , and T. At constant bulk composition there are only three independent phase composition variables , v ; ( e.g. , X2 , Y2 , Y1 ) . They have an implicit dependence on ɛ ;: d ( Aμ1 , Aμ2 , Aμ3 ) = 0 = ǝAμk ...
... constant bulk composition , P , and T. At constant bulk composition there are only three independent phase composition variables , v ; ( e.g. , X2 , Y2 , Y1 ) . They have an implicit dependence on ɛ ;: d ( Aμ1 , Aμ2 , Aμ3 ) = 0 = ǝAμk ...
Page 226
... constant was always observed at frequencies above 100 kHz . The dielectric constants at these high fre- quencies were identical for all samples and fully reproducible . At lower frequencies , the same behavior was found only for samples ...
... constant was always observed at frequencies above 100 kHz . The dielectric constants at these high fre- quencies were identical for all samples and fully reproducible . At lower frequencies , the same behavior was found only for samples ...
Page 228
... constant is shown in Fig . 7. Its absolute value , 6.5 , is virtually independent of temperature . There is no change in the dielectric constant during the transformation 2H - 12R . This surprising result has been verified by ...
... constant is shown in Fig . 7. Its absolute value , 6.5 , is virtually independent of temperature . There is no change in the dielectric constant during the transformation 2H - 12R . This surprising result has been verified by ...
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