Inorganic Solid Phases

K8[SiNb4W8O40]·12H2O (K8Nb4W8[SiO4]O36[H2O]12) Crystal Structure

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General Information

  • Phase Label(s): K8Nb4W8[SiO4]O36[H2O]12
  • Structure Class(es): –
  • Classification by Properties: –
  • Mineral Name(s): –
  • Pearson Symbol: cP78
  • Space Group: 221
  • Phase Prototype: K8(Nb0.33W0.67)12[SiO4]O36[H2O]12
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Enraf-Nonius CAD4 (determination of structural parameters), X-rays, Mo Kα; λ = 0.071073 nm (determination of cell and structural parameters)
  • Phase Class(es): –
  • Compound Class(es): orthosilicate, oxide, hydrate
  • Interpretation Detail(s): positions of non-H atoms determined, least-squares refinement; 312 reflections; I > 3σ(I), R = 0.055
  • Sample Detail(s): sample prepared from tungstic acid, potassium niobate, potassium silicate, K2CO3, chemical analysis; 10.56 wt.% K, 0.87 wt.% Si, 48.59 wt.% W, 12.41 wt.% Nb, 7.23 wt.% H2O, single crystal (determination of cell parameters), single crystal, 0.1×0.2×0.2 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: K8Nb4W8[SiO4]O36[H2O]12
  • Alphabetic Formula: [H2O]12K8Nb4O36[SiO4]W8
  • Published Formula: K8[SiNb4W8O40]·12H2O
  • Refined Formula: H24K8.01Nb4O52SiW8
  • Wyckoff Sequence: 221,mji2gfda
  • Z Formula Units: 1
  • Density: ρ = 4.19 Mg·m−3
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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_1903105

  • 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)

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