Inorganic Solid Phases

(NH4)3CrO8 ([NH4]3Cr[O2]4 lt1, T = 203(2) K) Crystal Structure

General Information

  • Phase Label(s): [NH4]3Cr[O2]4 lt1
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s):
  • Pearson Symbol: oS48
  • Space Group: 36
  • Phase Prototype: [NH4]3Cr[O2]4
  • Measurement Detail(s): automatic diffractometer (determination of cell and structural parameters), X-rays, Mo Kα; λ = 0.071073 nm (determination of cell and structural parameters), T = 203(2) K (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): peroxide
  • Interpretation Detail(s): complete structure determined; temperature dependence studied, full-matrix least-squares refinement; 84 variables; 1265 reflections; I > 2σ(I), R = 0.0291; wR = 0.0712
  • Sample Detail(s): sample prepared from CrO3, H2O2, NH3, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: [NH4]3Cr[O2]4
  • Alphabetic Formula: Cr[NH4]3[O2]4
  • Published Formula: (NH4)3CrO8
  • Refined Formula: CrH12N3O8
  • Wyckoff Sequence: 36,b3a6
  • Z Formula Units: 4
  • Density: ρ = 1.98 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_1932969

  • 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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