Inorganic Solid Phases

Fe,Mg olivine Fa27.8 (MgFe[SiO4]) Crystal Structure

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General Information

  • Phase Label(s): MgFe[SiO4]
  • Structure Class(es): –
  • Classification by Properties: nonmetal
  • Mineral Name(s): fayalite/forsterite
  • Pearson Symbol: oP28
  • Space Group: 62
  • Phase Prototype: Mg2[SiO4]
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Enraf-Nonius CAD4 (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters), T = 293 K (determination of cell and structural parameters)
  • Phase Class(es): –
  • Compound Class(es): orthosilicate
  • Interpretation Detail(s): complete structure determined, least-squares refinement; 1703 reflections, R = 0.0140; wR = 0.0115
  • Sample Detail(s): forsterite-fayalite sample from Germany, Saar-Nahe basin, lava flow, electron microprobe analysis; Ca0.0075Mg1.4475Mn0.0091Fe0.5601Si0.9820O4, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: Mg1.444Fe0.556[SiO4]
  • Alphabetic Formula: Fe0.556Mg1.444[SiO4]
  • Published Formula: Fe,Mg olivine Fa27.8
  • Refined Formula: Fe0.55Mg1.45O4Si
  • Wyckoff Sequence: 62,dc4a
  • Z Formula Units: 4
  • Density: ρ = 3.57 Mg·m−3
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Crystallographic Data

Cell Parameters

Published Data
Standardized Data
Unit Cell
Niggli-Reduced Cell
Space Group
a
b
c
α
β
γ
a/b
b/c
c/a
V

Atom Coordinates

Standardized

Site
Element
Wyckoff Symbol
Symmetry
X
Y
Z
Occupation
Co-ord. No.
Atomic Env.

Published

Site
Element
Wyckoff Symbol
Symmetry
X
Y
Z
Occupation

Displacement Parameters

Anisotropic

Site
B11 [nm2]
B22 [nm2]
B33 [nm2]
B12 [nm2]
B13 [nm2]
B23 [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1819701

  • Copyright

    ©Springer & Material Phases Data System (MPDS), Switzerland & National Institute for Materials Science (NIMS), Japan, 2016

  • Chief Editor

    Pierre Villars, Material Phases Data System (MPDS), CH-6354 Vitznau, Switzerland

    villars.mpds@bluewin.ch

  • Credits

    SpringerMaterials Release 2016.

    Data generated pre-2002: © Springer & MPDS & NIMS; post-2001: © Springer & MPDS

    All Rights Reserved. Version 2016.10.

    Project Coordinator: Shuichi Iwata

    Section-Editor: Karin Cenzual (Crystal Structures)

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