Structural and Magnetic Phase Transitions in Minerals |
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Page 11
... symmetry pattern . The hypothetical Al , Si ordering phase transition takes place at high temperatures above the melting point . Its symmetry change is according to our basic assumption of a monoclinic paraphase C2 / m → Ci II . We ...
... symmetry pattern . The hypothetical Al , Si ordering phase transition takes place at high temperatures above the melting point . Its symmetry change is according to our basic assumption of a monoclinic paraphase C2 / m → Ci II . We ...
Page 19
... symmetry - breaking transitions , but fluctuation effects are outside its range of validity . For a transition that conserves the number of atoms in the unit cell , the order parameter is associated with the development of a new ...
... symmetry - breaking transitions , but fluctuation effects are outside its range of validity . For a transition that conserves the number of atoms in the unit cell , the order parameter is associated with the development of a new ...
Page 143
... symmetry of the high - temperature phase is orthorhombic , space group Pnam , where the Fe2 + and Fe3 + ions occur in 8 ( d ) positions ( A sites ) . Below the crystallo- graphic phase transition at around 343 K ( Ghose et al . , 1984a ...
... symmetry of the high - temperature phase is orthorhombic , space group Pnam , where the Fe2 + and Fe3 + ions occur in 8 ( d ) positions ( A sites ) . Below the crystallo- graphic phase transition at around 343 K ( Ghose et al . , 1984a ...
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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Other editions - View all
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