Structural and Magnetic Phase Transitions in Minerals |
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Page 11
... order parameters is bilinear for Na - feldspar and biquadratic for anorthite . The biquadratic coupling including ... parameter indirectly . The most tradi- tional way to measure the order parameter is to follow the temperature evolution ...
... order parameters is bilinear for Na - feldspar and biquadratic for anorthite . The biquadratic coupling including ... parameter indirectly . The most tradi- tional way to measure the order parameter is to follow the temperature evolution ...
Page 11
... order parameter Qod changes more rapidly with temperature , and changes in the structural state are caused mainly by Al , Si ordering . Low albite is characterized , therefore , by saturation of the displacive order parameter Q and ...
... order parameter Qod changes more rapidly with temperature , and changes in the structural state are caused mainly by Al , Si ordering . Low albite is characterized , therefore , by saturation of the displacive order parameter Q and ...
Page 13
... order parameters can now be depicted con- veniently in order parameter vector space ( Fig . 5 ) . Each structural state of Na- feldspar in thermodynamic equilibrium is defined by one pair of parameters , Q and Qod . It is represented by ...
... order parameters can now be depicted con- veniently in order parameter vector space ( Fig . 5 ) . Each structural state of Na- feldspar in thermodynamic equilibrium is defined by one pair of parameters , Q and Qod . It is represented by ...
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 |
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