## Structural and magnetic phase transitions in mineralsThis volume in Advances in Physical Geochemistry presents the latest synthesis of theory and experimental data pertaining to structural and magnetic phase transitions in a variety of geochemically important minerals. The book is the first to cover the impact of this rapidly progressing area of solid state physics in earth sciences and reflects its growing significance for mineralogy and petrology. |

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Page 8

The underlying Cartesian coordinate system in feldspars is (Redfern and Salje,

1987) R2: parallel to the crystallographic b axis R,: parallel to the crystallographic

c* axis R,: perpendicular to both The

The underlying Cartesian coordinate system in feldspars is (Redfern and Salje,

1987) R2: parallel to the crystallographic b axis R,: parallel to the crystallographic

c* axis R,: perpendicular to both The

**components**of the spontaneous strain ...Page 9

that some of these tensor

useful to express the strain tensor as a representation surface The strain ellipsoid

then becomes rf + r§ + r§ = 1 (1 + 81)' (1 + 81)' (1 + 8,)' where s,- are the principal

...

that some of these tensor

**components**have very small numerical values. It isuseful to express the strain tensor as a representation surface The strain ellipsoid

then becomes rf + r§ + r§ = 1 (1 + 81)' (1 + 81)' (1 + 8,)' where s,- are the principal

...

Page 40

Experiments have shown that the effect of minor

relations is dramatic (e.g., Gasparik, 1984; Lindsley, 1983; Mori 1978; Perkins

and Newton, 1980). Consequently, simple linear projection schemes, particularly

for ...

Experiments have shown that the effect of minor

**components**on Di-En phaserelations is dramatic (e.g., Gasparik, 1984; Lindsley, 1983; Mori 1978; Perkins

and Newton, 1980). Consequently, simple linear projection schemes, particularly

for ...

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### Contents

Incommensurate Phase Transitions in Quartz and Berlinite | 17 |

Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |

Multicritical Phase Relations in Minerals | 60 |

Copyright | |

7 other sections not shown

### 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 |

### Common terms and phrases

anisotropy ANNNI model antiferromagnetic approximation atoms axis Bachheimer Ballet behavior berlinite Bukowinski calculated canting cation distributions Chem chemical cluster Coey composition conﬁguration coupling crystal ﬁeld crystal structure crystallographic decreases deﬁned density disordered Dolino Earth Planet electron entropy equilibrium experimental Fe2SiO feldspar ferromagnetic ﬁrst ﬁt free energy Geophys Ghose grunerite 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 MgSiO Mineral Mn2SiO4 mode Mossbauer neutron diffraction observed octahedral olivines orbital order parameter orthopyroxene orthorhombic pairs Pbl2 perovskite phase diagrams phase transition Phys polytypes polytypic phases predicted pyroxenes quartz reﬂections Salje sample shown in Fig silicates SiO2 solid solutions speciﬁc heat spin glass susceptibility symmetry temperature dependence thermal expansion thermodynamic tion transformation X-ray zero pressure