Structural and Magnetic Phase Transitions in Minerals |
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Page 167
... canted fer- romagnetic , whereas that of the M2 sheets is collinear antiferromagnetic . It was originally thought that the canting sets in only below a temperature T≈ 23 K ( Santoro et al . , 1966 ) , where there was a maximum in the ...
... canted fer- romagnetic , whereas that of the M2 sheets is collinear antiferromagnetic . It was originally thought that the canting sets in only below a temperature T≈ 23 K ( Santoro et al . , 1966 ) , where there was a maximum in the ...
Page 168
... canted af M1 chains af ; canted ferro M1 chains Referencesa 1 , 2 , 3 , 4 1 , 2 , 3 , 4 af ; canted ferro M1 chains 1 , 2 , 3 , 4 Table 1. Magnetic properties of olivines The Mn , Co , and Ni analogs of fayalite. Co2SiO4 50 Ni2SiO4 34 ...
... canted af M1 chains af ; canted ferro M1 chains Referencesa 1 , 2 , 3 , 4 1 , 2 , 3 , 4 af ; canted ferro M1 chains 1 , 2 , 3 , 4 Table 1. Magnetic properties of olivines The Mn , Co , and Ni analogs of fayalite. Co2SiO4 50 Ni2SiO4 34 ...
Page 200
... Canting 12 Turning now to the interpretation of the canting , Ballet and Fuess ( 1988a ) show that the single - ion anisotropy and a negative value of J12 are both possible reasons for sig- nificant canting . In case of canting in the ...
... Canting 12 Turning now to the interpretation of the canting , Ballet and Fuess ( 1988a ) show that the single - ion anisotropy and a negative value of J12 are both possible reasons for sig- nificant canting . In case of canting in the ...
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