Structural and Magnetic Phase Transitions in Minerals |
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Page 217
... models have been discussed , such as growth models ( e.g. , Trigunayat and Chadha , 1971 ) , the entropy model of Jagodzinski ( 1954 ) , and , more recently , pseudospin models like the ANNNI model ( Yeomans and Price , 1986 ) . In the ...
... models have been discussed , such as growth models ( e.g. , Trigunayat and Chadha , 1971 ) , the entropy model of Jagodzinski ( 1954 ) , and , more recently , pseudospin models like the ANNNI model ( Yeomans and Price , 1986 ) . In the ...
Page 233
... ANNNI model , which will be discussed later . First , a phase is considered which consists of structural elements that are identical to the 2H or the 12R structure or mixtures of them . The enthalpy of mixing of such a phase is Hmix = X ...
... ANNNI model , which will be discussed later . First , a phase is considered which consists of structural elements that are identical to the 2H or the 12R structure or mixtures of them . The enthalpy of mixing of such a phase is Hmix = X ...
Page 236
... models , like the ANNNI model , which will be discussed later . Further investigations of the lattice dynamics of PbI , are under way to clarify the role of the interlayer interactions in phases 2H and 12R . Isospin Models Although no ...
... models , like the ANNNI model , which will be discussed later . Further investigations of the lattice dynamics of PbI , are under way to clarify the role of the interlayer interactions in phases 2H and 12R . Isospin Models Although no ...
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