Inorganic Solid Phases

Mg8(Mg2Al2)Al8Si12(O,OH)56 (Mg5Al5Si6O21[OH]7) Crystal Structure

General Information

  • Phase Label(s): Mg5Al5Si6O21[OH]7
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s):
  • Pearson Symbol: mP94
  • Space Group: 11
  • Phase Prototype: Mg5Al5Si6O21[OH]7
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; France, Grenoble, European Synchrotron Radiation Facility ESRF, GILDA, BM08 (determination of structural parameters), X-rays, synchrotron; λ = 0.130365 nm (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, silicate
  • Interpretation Detail(s): positions of non-H atoms determined, Rietveld refinement, multiphase; 116 variables; 587 reflections, wRP = 0.038; RB = 0.085
  • Sample Detail(s): sample prepared from Mg, tetraethylorthosilicate (TEOS), Al, HNO3, electron microprobe analysis; Mg5.056Al4.994Si5.950[O,OH]28; amounts of coesite (6 wt.%), powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: Mg5Al5Si6O21[OH]7
  • Alphabetic Formula: Al5Mg5O21[OH]7Si6
  • Published Formula: Mg8(Mg2Al2)Al8Si12(O,OH)56
  • Refined Formula: Al5.01Mg4.76O28Si6
  • Wyckoff Sequence: 11,f8e27dcba
  • Z Formula Units: 2
  • Density: ρ = 3.24 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_1617611

  • 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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