Inorganic Solid Phases

Ca2Al2SiO7, Ca2Al2.22Si0.78O6.78(OH)0.22 (Ca2Al2.22Si0.78O6.78[OH]0.22) Crystal Structure

General Information

  • Phase Label(s): Ca2Al2.22Si0.78O6.78[OH]0.22
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): gehlenite
  • Pearson Symbol: tP24
  • Space Group: 113
  • Phase Prototype: (Ca0.5La0.5)2Ga3S7
  • Measurement Detail(s): automatic diffractometer; 12 (determination of cell parameters), automatic diffractometer; Russia, Obninsk, Karpov Institute of Physical Chemistry, VVR-Ts reactor (determination of structural parameters), neutrons; λ = 0.1406 nm (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, silicate
  • Interpretation Detail(s): complete structure determined, Rietveld refinement, RP = 0.0788; wRP = 0.1001; RB = 0.0376
  • Sample Detail(s): gehlenite sample from synthetic, sample prepared from CaCO3, Al2O3, SiO2, powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: Ca2Al2.22Si0.78O6.78[OH]0.22
  • Alphabetic Formula: Al2.22Ca2O6.78[OH]0.22Si0.78
  • Published Formula: Ca2Al2SiO7, Ca2Al2.22Si0.78O6.78(OH)0.22
  • Refined Formula: Al2.22Ca2O7Si0.78
  • Wyckoff Sequence: 113,fe3ca
  • Z Formula Units: 2
  • Density: ρ = 3.05 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]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1802051

  • 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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