## 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 194

The quantity observed in a polarized neutron experiment is the flipping ratio I (FN

-Fu") 1 – y FM 4 FT (F.I.F.I.), T 1 + y F. where Fw is the nuclear structure factor and

Fw– the

The quantity observed in a polarized neutron experiment is the flipping ratio I (FN

-Fu") 1 – y FM 4 FT (F.I.F.I.), T 1 + y F. where Fw is the nuclear structure factor and

Fw– the

**magnetic structure**factor component perpendicular to the scattering ...Page 195

A map showing the difference Fourier transform between the observed

small number of observed reflections results in parasitic oscillations. Therefore ...

A map showing the difference Fourier transform between the observed

**magnetic****structure**factors and those given by the first model is not possible, because thesmall number of observed reflections results in parasitic oscillations. Therefore ...

Page 206

Ballet, O., Fuess, H., and Fritzsche, T. (1987)

distribution in (Fe,Mn)2SiO, (olivine) by neutron diffraction. Phys. Chem. Minerals.

15, 54–58. Ballet, O., and Fuess, H. (1988a) Analytical interpretation of the

magnetic ...

Ballet, O., Fuess, H., and Fritzsche, T. (1987)

**Magnetic structure**and cationdistribution in (Fe,Mn)2SiO, (olivine) by neutron diffraction. Phys. Chem. Minerals.

15, 54–58. Ballet, O., and Fuess, H. (1988a) Analytical interpretation of the

magnetic ...

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### Contents

Preface | 1 |

Incommensurate Phase Transitions in Quartz and Berlinite | 17 |

Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |

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 components composition coupling crystal field crystal structure crystallographic Davidson decreases density disordered Dolino Earth Planet electron equilibrium experimental Fe2SiO4 feldspar ferromagnetic free energy Geophys Ghose high pressure high-spin ilvaite inc phase incommensurate phase interactions ions Jeanloz Landau theory lattice layers Lindsley long-range order low temperatures lower mantle LS transition M2 sites magnetic order Magnetic Phase Transitions magnetic properties magnetic structure Matsui measurements MgSiO3 perovskite Mineral Mn2SiO4 Mössbauer neutron diffraction observed octahedral olivines orbital order parameter orthopyroxene orthorhombic oxides pairs perovskite phase diagrams phase transition Phys polytypes polytypic phases predicted pyroxenes quartz Salje sample shown in Fig silicates SiO2 SiO4 solid solutions space group spin glass susceptibility symmetry temperature dependence thermal expansion thermodynamic tion transformation X-ray zero pressure