Inorganic Solid Phases

K ferri-ferro richterite; K(Na1+xCa1−x)Fe5Si8O22(OH)2 (K0.9Na1.6Ca0.5Fe5Si8O22[OH]2) Crystal Structure

General Information

  • Phase Label(s): K0.9Na1.6Ca0.5Fe5Si8O22[OH]2
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): richterite
  • Pearson Symbol: mS80
  • Space Group: 12
  • Phase Prototype: NaCa2Mg2(Mg0.67Sc0.33)3(Al0.25Si0.75)8O22[OH]2
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; STOE IPDS (determination of structural parameters), X-rays, Mo Kα; λ = 0.071073 nm (determination of cell and structural parameters), T = 298 K (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, silicate
  • Interpretation Detail(s): complete structure determined; temperature dependence studied, full-matrix least-squares refinement; 105 variables; 1150 reflections, R = 0.0214; wR = 0.0576
  • Sample Detail(s): richterite sample from synthetic, sample prepared from K2[CO3], Na2[CO3], Ca[CO3], Fe2O3 (hematite), SiO2, electron microprobe analysis, Mössbauer spectroscopy; (K0.90(2)Na0.06(2))(Ca0.58(1)Na1.36(2)Fe2+0.06(2))(Fe2+3.48(2)Fe3+1.52(2))Si7.99(1)O22[OH]2; amounts of clinopyroxene, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: K0.9Na1.4Ca0.6Fe5.1Si8O22[OH]2
  • Alphabetic Formula: Ca0.6Fe5.1K0.9Na1.4O22[OH]2Si8
  • Published Formula: K ferri-ferro richterite; K(Na1+xCa1−x)Fe5Si8O22(OH)2
  • Refined Formula: Ca0.55Fe5.06H2K0.93Na1.46O24Si8
  • Wyckoff Sequence: 12,j7i2h2gba
  • Z Formula Units: 2
  • Density: ρ = 3.46 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_1601889

  • 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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