Inorganic Solid Phases

chromian mica, 2M1; (Si6.18Al1.82)O20(Al2.65Cr0.36Fe3+0.15Fe2+0.04Mg1.1)(Ca0.25Na0.11K1.38)(OH)3.78 (K0.69Na0.05Ca0.13Mg0.55Cr0.18Fe0.1Al2.24Si3.09O10[OH]2) Crystal Structure

General Information

  • Phase Label(s): K0.69Na0.05Ca0.13Mg0.55Cr0.18Fe0.1Al2.24Si3.09O10[OH]2
  • Structure Class(es): mica family
  • Classification by Properties:
  • Mineral Name(s): muscovite 2M1
  • Pearson Symbol: mS76
  • Space Group: 15
  • Phase Prototype: KAl2(Al0.25Si0.75)4O10[OH]2-a
  • Measurement Detail(s): automatic diffractometer; 28 (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): hydroxide, silicate
  • Interpretation Detail(s): positions of non-H atoms determined, least-squares refinement; I > 3σ(I), R = 0.117
  • Sample Detail(s): chromian mica sample from Spain, Sierra Nevada, sample prepared from chromian mica, atomic absorption spectroscopy, chemical analysis; K1.38Na0.11Ca0.25Ba0.01Rb0.01Mg1.1Fe3+0.15Fe2+0.06Li0.01Cr0.36Ti0.02Al2.65Al1.82Si6.18O20[OH]3.87, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: K0.69Na0.05Ca0.13Mg0.55Cr0.18Fe0.1Al2.24Si3.09O10[OH]2
  • Alphabetic Formula: Al2.24Ca0.13Cr0.18Fe0.1K0.69Mg0.55Na0.05O10[OH]2Si3.09
  • Published Formula: chromian mica, 2M1; (Si6.18Al1.82)O20(Al2.65Cr0.36Fe3+0.15Fe2+0.04Mg1.1)(Ca0.25Na0.11K1.38)(OH)3.78
  • Refined Formula: Al2.15Ca0.13Cr0.16Fe0.10H2K0.69Mg0.50Na0.05O12Si3.09
  • Wyckoff Sequence: 15,f9e
  • Z Formula Units: 4
  • Density: ρ = 2.86 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_1603372

  • 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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