Structural and Magnetic Phase Transitions in Minerals |
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Page 21
... variation depends only on even powers of η . In a first approximation , one expects a variation proportional to n2 , possibly super- imposed on a linear variation with temperature . Such variations have been found for 15 10 5 0 273 473 ...
... variation depends only on even powers of η . In a first approximation , one expects a variation proportional to n2 , possibly super- imposed on a linear variation with temperature . Such variations have been found for 15 10 5 0 273 473 ...
Page 30
... variation of the modulus of the modulation wave vector q 。 measured by y - ray diffraction ( Bastie and Dolino ... variation similar to that of ax , in good agreement with Pippard's relation ( Eq . 3 ) . Large variations have also been ...
... variation of the modulus of the modulation wave vector q 。 measured by y - ray diffraction ( Bastie and Dolino ... variation similar to that of ax , in good agreement with Pippard's relation ( Eq . 3 ) . Large variations have also been ...
Page 31
... variation of birefringence in such cycles , measured with a rate of change of temperature of 10 mK / h . Parts A and C , with small slopes , are attributed to a variation in birefrin- gence at a constant value of modulation wavevectors ...
... variation of birefringence in such cycles , measured with a rate of change of temperature of 10 mK / h . Parts A and C , with small slopes , are attributed to a variation in birefrin- gence at a constant value of modulation wavevectors ...
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