Structural and Magnetic Phase Transitions in Minerals |
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Page 66
... respectively , were calculated by counting the vertical A = B interlayer pairs and horizontal A - B intralayer pairs ( subject to periodic boundary conditions ) and then assigning energies Ɛier = ε ( A = B ) = ɛ ( B = A ) = ɛ , and ...
... respectively , were calculated by counting the vertical A = B interlayer pairs and horizontal A - B intralayer pairs ( subject to periodic boundary conditions ) and then assigning energies Ɛier = ε ( A = B ) = ɛ ( B = A ) = ɛ , and ...
Page 134
... respectively , which correspond to 8c and 4a positions of Fm3m , respectively . If the positional parameter for 8c in Pa3 is equal to 0.25 , the structure is identical to the fluorite structure . The Fm3m - to - Pa3 transition is first ...
... respectively , which correspond to 8c and 4a positions of Fm3m , respectively . If the positional parameter for 8c in Pa3 is equal to 0.25 , the structure is identical to the fluorite structure . The Fm3m - to - Pa3 transition is first ...
Page 195
... respectively . A map showing the difference Fourier transform between the observed magnetic structure factors and those given by the first model is not possible , because the small number of observed reflections results in parasitic ...
... respectively . A map showing the difference Fourier transform between the observed magnetic structure factors and those given by the first model is not possible , because the small number of observed reflections results in parasitic ...
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