Inorganic Solid Phases

Na1.00Na1.97Mg0.03Mg4.03Cr0.97Si8O22F2 (Na2.97Mg4.06Cr0.97Si8O22F2) Crystal Structure

General Information

  • Phase Label(s): Na2.97Mg4.06Cr0.97Si8O22F2
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s):
  • Pearson Symbol: mS88
  • Space Group: 12
  • Phase Prototype: Na2.08Mg5.78Al0.12Si8O22F2
  • Measurement Detail(s): automatic diffractometer; 50 (determination of cell parameters), automatic diffractometer; Philips PW1100 (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): silicate, fluoride
  • Interpretation Detail(s): complete structure determined, 776 reflections; I > 5σ(I), R = 0.020
  • Sample Detail(s): amphibole group sample from synthetic, sample prepared from NaF, MgO, Cr2O3, SiO2, electron microprobe analysis, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: Na2.97Mg4.06Cr0.97Si8O22F2
  • Alphabetic Formula: Cr0.97F2Mg4.06Na2.97O22Si8
  • Published Formula: Na1.00Na1.97Mg0.03Mg4.03Cr0.97Si8O22F2
  • Refined Formula: Cr1.13F2Mg4.10Na2.77O22Si8
  • Wyckoff Sequence: 12,j7i3h2g2ba
  • Z Formula Units: 2
  • Density: ρ = 3.11 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_1617582

  • 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

    Citation copied