Inorganic Solid Phases

(NH4+)1.56(H3O+)0.19Mg0.75Al10.25O17(H2O)0.25 ([H3O]0.19[NH4]1.56Mg0.75Al10.25O17[H2O]0.25) Crystal Structure

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General Information

  • Phase Label(s): [H3O]0.19[NH4]1.56Mg0.75Al10.25O17[H2O]0.25
  • Structure Class(es): β"-alumina
  • Classification by Properties: –
  • Mineral Name(s): –
  • Pearson Symbol: hR108
  • Space Group: 166
  • Phase Prototype: K1.6(Mg0.3Al0.7)2Al9O17
  • Measurement Detail(s): automatic diffractometer; 25 (determination of cell parameters), automatic diffractometer; Sweden, Studsvik Neutron Research Laboratory, R2 reactor (determination of structural parameters), X-rays (determination of cell parameters), neutrons; λ = 0.121 nm (determination of structural parameters), T = 295 K (determination of structural parameters)
  • Phase Class(es): –
  • Compound Class(es): oxide, hydrate
  • Interpretation Detail(s): complete structure determined, full-matrix least-squares refinement; 1505 reflections; F2 > 2σ(F2), R = 0.035; wR = 0.049
  • Sample Detail(s): sample prepared from alumina, NH4NO3, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: [H3O]0.19[NH4]1.56Mg0.75Al10.25O17[H2O]0.25
  • Alphabetic Formula: Al10.25[H2O]0.25[H3O]0.19Mg0.75[NH4]1.56O17
  • Published Formula: (NH4+)1.56(H3O+)0.19Mg0.75Al10.25O17(H2O)0.25
  • Refined Formula: Al10.25H7.30Mg0.75N1.56O17.44
  • Wyckoff Sequence: 166,h4c5ba
  • Z Formula Units: 3
  • Density: ρ = 3.18 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

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1614157

  • 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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