Inorganic Solid Phases

K-βAl2O3, 26(5) % excess K (K1.3Al10.9O17) Crystal Structure

General Information

  • Phase Label(s): K1.3Al10.9O17
  • Structure Class(es): β-alumina
  • Classification by Properties: ionic conductor
  • Mineral Name(s):
  • Pearson Symbol: hP72
  • Space Group: 194
  • Phase Prototype: TlAl11O17
  • Measurement Detail(s): Debye-Scherrer film (determination of cell parameters), automatic diffractometer; General Electric XRD-5 (determination of structural parameters), X-rays, Cr Kα (determination of cell parameters), X-rays, Mo Kα (determination of structural parameters)
  • Phase Class(es):
  • Compound Class(es): oxide
  • Interpretation Detail(s): complete structure determined, least-squares refinement; 553 reflections; I > 0σ(I), R = 0.056; wR = 0.083
  • Sample Detail(s): sample prepared from Na+ β"-alumina, K halide, powder (determination of cell parameters), single crystal, 0.50×0.50×0.12 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: K1.27Al10.91O17
  • Alphabetic Formula: Al10.91K1.27O17
  • Published Formula: K-βAl2O3, 26(5) % excess K
  • Refined Formula: Al11K1.32O16.95
  • Wyckoff Sequence: 194,k3h3f3ea
  • Z Formula Units: 2
  • Density: ρ = 3.33 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

Anisotropic

Site
β11 [nm2]
β22 [nm2]
β33 [nm2]
2β12 [nm2]
2β13 [nm2]
2β23 [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1900224

  • 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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