Structural and Magnetic Phase Transitions in Minerals |
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Page 22
... Temperature variation of the transition parameter ʼn ( + ) rotation of SiO4 tetrahedra , from the X - ray measurement of Young ( 1962 ) . ( x ) Second harmonic generation from Bach- heimer and Dolino ( 1975 ) ( normalized to X - ray ...
... Temperature variation of the transition parameter ʼn ( + ) rotation of SiO4 tetrahedra , from the X - ray measurement of Young ( 1962 ) . ( x ) Second harmonic generation from Bach- heimer and Dolino ( 1975 ) ( normalized to X - ray ...
Page 31
... Temperature 0.05K Fig . 8. Birefringence variation during very slow temperature cycles in the incommensurate phase near Tc . ( a ) 0.01 K / h ; ( b ) 0.005 K / h ; ( c ) 0.01 K / h but with a cycle made after maintain- ing the temperature ...
... Temperature 0.05K Fig . 8. Birefringence variation during very slow temperature cycles in the incommensurate phase near Tc . ( a ) 0.01 K / h ; ( b ) 0.005 K / h ; ( c ) 0.01 K / h but with a cycle made after maintain- ing the temperature ...
Page 165
... temperatures can be considerable . Finally , one can speculate about what ... temperature 0 in the expression x = C / ( T- 0 ) one deduces the average ... variation due to the excitation of spin waves . Schottky anomalies can arise ...
... temperatures can be considerable . Finally , one can speculate about what ... temperature 0 in the expression x = C / ( T- 0 ) one deduces the average ... variation due to the excitation of spin waves . Schottky anomalies can arise ...
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