Inorganic Solid Phases

diopside-hedenbergite (CaMg0.75Fe0.25Si2O6) Crystal Structure

General Information

  • Phase Label(s): CaMg0.75Fe0.25Si2O6
  • Structure Class(es):
  • Classification by Properties: antiferromagnet AFM
  • Mineral Name(s): diopside/hedenbergite
  • Pearson Symbol: mS40
  • Space Group: 15
  • Phase Prototype: CaMgSi2O6
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Syntex P21 (determination of structural parameters), X-rays, Mo Kα; λ = 0.07107 nm (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): silicate
  • Interpretation Detail(s): complete structure determined, full-matrix least-squares refinement, R = 0.053
  • Sample Detail(s): diopside sample from Russia, Siberia, East Sayan Mountains, sample prepared from diopside, chemical analysis; 49.68 SiO2, 1.41 Al2O3, 2.00 Fe2O3, 14.90 FeO, 0.18 MnO, 11.55 MgO, 19.64 CaO, 0.28 wt.% Na2O, single crystal (determination of cell parameters), single crystal, 0.2×0.2×0.3 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: CaMg0.52Fe0.48Si2O6
  • Alphabetic Formula: CaFe0.48Mg0.52O6Si2
  • Published Formula: diopside-hedenbergite
  • Refined Formula: CaFe0.48Mg0.52O6Si2
  • Wyckoff Sequence: 15,f4e2
  • Z Formula Units: 4
  • Density: ρ = 3.48 Mg·m−3

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

Isotropic

Site
Published
B [nm2]
Type
Computed
Beq [nm2]

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_1602103

  • 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)

  • Cite this content

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