Inorganic Solid Phases

Li2(Mg,Fe2+)3(Al,Fe3+3)2Si8O22(OH,F)2, Li2Fe0.93Mg2.63Al1.44(Si,Al)8O22(OH,F)2 (Li2Mg2.63Fe0.93Al1.44Si8O22[OH]1.9F0.1) Crystal Structure

General Information

  • Phase Label(s): Li2Mg2.63Fe0.93Al1.44Si8O22[OH]1.9F0.1
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): holmquistite
  • Pearson Symbol: oP156
  • Space Group: 62
  • Phase Prototype: Na0.1Li1.8Mg1.75Fe1.45Al1.95Si7.9O22.1[OH]1.9
  • Measurement Detail(s): automatic diffractometer (determination of cell and structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, silicate, fluoride
  • Interpretation Detail(s): positions of non-H atoms determined, least-squares refinement; 1754 reflections; I > 2σ(I), R = 0.070; wR = 0.073
  • Sample Detail(s): holmquisite sample from Sweden, Stockholm archipelago, Utö, electron microprobe analysis; 62.8 wt.% SiO2, 8.76 wt.% Al2O3, < 0.02 wt.% TiO2, 11.2 wt.% FeO, 0.52 wt.% MnO, 12.7 wt.% MgO, < 0.02 wt.% CaO, 0.23 wt.% Na2O, < 0.02 wt.% K2O; Li content not analyzed, single crystal (determination of cell parameters), single crystal, 0.08×0.18×0.28 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: Li2Mg2.63Fe0.93Al1.44Si8O22[OH]1.9F0.1
  • Alphabetic Formula: Al1.44F0.1Fe0.93Li2Mg2.63O22[OH]1.9Si8
  • Published Formula: Li2(Mg,Fe2+)3(Al,Fe3+3)2Si8O22(OH,F)2, Li2Fe0.93Mg2.63Al1.44(Si,Al)8O22(OH,F)2
  • Refined Formula: Al1.44F0.10Fe0.93H1.90Li2Mg2.63O23.90Si8
  • Wyckoff Sequence: 62,d17c5
  • Z Formula Units: 4
  • Density: ρ = 3.04 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_1214358

  • 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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