Inorganic Solid Phases

Mg(Al2−pCrp)O4 (MgCr0.2Al1.8O4) Crystal Structure

General Information

  • Phase Label(s): MgCr0.2Al1.8O4
  • Structure Class(es): spinel family
  • Classification by Properties:
  • Mineral Name(s): spinel
  • Pearson Symbol: cF56
  • Space Group: 227
  • Phase Prototype: MgAl2O4
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; STOE AED2 (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): oxide
  • Interpretation Detail(s): complete structure determined; composition dependence studied, full-matrix least-squares refinement on F2, wR = 0.027
  • Sample Detail(s): spinel group sample from Russia, western Lake Baikal, Olkhon metamorphic complex, electron microprobe analysis; Mg1.011(9)Al1.873(9)Cr0.116(8)Zn0.005(2)O4, single crystal (determination of cell parameters), single crystal, 0.244 mm diameter (determination of structural parameters)

Substance Summary

  • Standard Formula: MgCr0.116Al1.884O4
  • Alphabetic Formula: Al1.884Cr0.116MgO4
  • Published Formula: Mg(Al2−pCrp)O4
  • Refined Formula: Al1.88Cr0.12MgO4
  • Wyckoff Sequence: 227,ecb
  • Z Formula Units: 8
  • Density: ρ = 3.63 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
U [nm2]
Type
Computed
Beq [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1820784

  • 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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