Structural and Magnetic Phase Transitions in Minerals |
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Page 93
... structure . Powder diffraction data on synthetic samples indicate an orthorhombic structure with Z = 4 , having either a Pbnm ( centrosymmetric ) or Pbn2 , ( noncen- trosymmetric ) space group ( Ito and Matsui , 1978 ; Yagi et al ...
... structure . Powder diffraction data on synthetic samples indicate an orthorhombic structure with Z = 4 , having either a Pbnm ( centrosymmetric ) or Pbn2 , ( noncen- trosymmetric ) space group ( Ito and Matsui , 1978 ; Yagi et al ...
Page 134
... structure definitely has a lower cohesive energy ( Fig . 2 ) and the space group Pa3 is a sub- group of Fm3m , to which the fluorite structure belongs . In the Pa3 - silica phase , oxygen and silicon atoms are at 8c and 4a positions ...
... structure definitely has a lower cohesive energy ( Fig . 2 ) and the space group Pa3 is a sub- group of Fm3m , to which the fluorite structure belongs . In the Pa3 - silica phase , oxygen and silicon atoms are at 8c and 4a positions ...
Page 215
... Structure des ferrites ferrimagnétiques des terres rares , C. R. Acad . Sci . Paris 242 , 382-384 . Brückel , T. , Köbler , U. , Prandl , W. , and Weinmann , R. ( 1986 ) Magnetisation phenomena due to magnetic disorder in the partly ...
... Structure des ferrites ferrimagnétiques des terres rares , C. R. Acad . Sci . Paris 242 , 382-384 . Brückel , T. , Köbler , U. , Prandl , W. , and Weinmann , R. ( 1986 ) Magnetisation phenomena due to magnetic disorder in the partly ...
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