Inorganic Solid Phases

(UO2)2[AsO4][PO4,AsO4][NH4][H3O]·6H2O ([H3O][NH4][UO2]2[AsO4]1.22[PO4]0.78[H2O]6) Crystal Structure

General Information

  • Phase Label(s): [H3O][NH4][UO2]2[AsO4]1.22[PO4]0.78[H2O]6
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): uramarsite
  • Pearson Symbol: aP24
  • Space Group: 1
  • Phase Prototype: [H3O][NH4][UO2]2[AsO4]1.22[PO4]0.78[H2O]6
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Oxford Diffraction Xcalibur S (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): arsenate, orthophosphate, hydrate
  • Interpretation Detail(s): positions of non-H atoms determined, full-matrix least-squares refinement; 638 reflections; F > 1σ(F), R = 0.0942
  • Sample Detail(s): uramarsite sample from Kazakhstan, Bota-Burum deposit, sample prepared from uramarsite, electron microprobe analysis, ionometry; Na0.09[H3O]0.72[NH4]1.15[UO2]2.02[AsO4]1.22[PO4]0.78[H2O]6.1, single crystal (determination of cell parameters), single crystal, 0.06×0.1×0.1 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: [H3O][NH4][UO2]2[AsO4]1.22[PO4]0.78[H2O]6
  • Alphabetic Formula: [AsO4]1.22[H2O]6[H3O][NH4][PO4]0.78[UO2]2
  • Published Formula: (UO2)2[AsO4][PO4,AsO4][NH4][H3O]·6H2O
  • Refined Formula: As1.22H19NO19P0.78U2
  • Wyckoff Sequence: 1,a24
  • Z Formula Units: 1
  • Density: ρ = 3.23 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

Powder Pattern

published defraction line
d [Å]
computed diffraction line for Cu Kα
d [nm]
intensity
I [1]
h [1]
k [1]
l [1]
Radiation
Remark

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1603221

  • 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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