Inorganic Solid Phases

(K0.56Na0.42)[(UO2)(SiO3OH)](H2O)1.5 (K0.56Na0.42[UO2]SiO3[OH][H2O]1.5) Crystal Structure

General Information

  • Phase Label(s): K0.56Na0.42[UO2]SiO3[OH][H2O]1.5
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): boltwoodite
  • Pearson Symbol: mP28
  • Space Group: 11
  • Phase Prototype: K0.56Na0.42[UO2]SiO3[OH][H2O]1.5
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Siemens P4 SMART (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, silicate, hydrate
  • Interpretation Detail(s): positions of non-H atoms determined, full-matrix least-squares refinement; 760 reflections; F > 4σ(F), R = 0.032
  • Sample Detail(s): boltwoodite sample from Namibia, Swakopmund, Rössing mine, electron microprobe analysis; 2.665 wt.% Na2O, 5.415 wt.% K2O, 0.12 wt.% CaO, 14.47 wt.% SiO2, 68.535 wt.% UO2, 8.21 wt.% H2O, single crystal (determination of cell parameters), single crystal, 0.02×0.04×0.11 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: K0.56Na0.42[UO2]SiO3[OH][H2O]1.5
  • Alphabetic Formula: [H2O]1.5K0.56Na0.42O3[OH]Si[UO2]
  • Published Formula: (K0.56Na0.42)[(UO2)(SiO3OH)](H2O)1.5
  • Refined Formula: H3.96K0.56Na0.42O7.48SiU
  • Wyckoff Sequence: 11,f3e7a
  • Z Formula Units: 2
  • Density: ρ = 4.36 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]

Anisotropic

Site
U11 [nm2]
U22 [nm2]
U33 [nm2]
U12 [nm2]
U13 [nm2]
U23 [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1014072

  • 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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