Inorganic Solid Phases

La9.50.5(Ge5.5Al0.5O24)O2 (La4.75Al0.25Ge2.75O13, T = 1173 K) Crystal Structure

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General Information

  • Phase Label(s): La4.75Al0.25Ge2.75O13
  • Structure Class(es): apatite family
  • Classification by Properties: –
  • Mineral Name(s): –
  • Pearson Symbol: hP54
  • Space Group: 176
  • Phase Prototype: La4.75(Al0.08Ge0.92)3O13
  • Measurement Detail(s): automatic diffractometer (determination of cell and structural parameters), neutrons; λ = 0.18860 nm (determination of cell and structural parameters), T = 1173 K (determination of cell and structural parameters)
  • Phase Class(es): –
  • Compound Class(es): oxide
  • Interpretation Detail(s): complete structure determined; temperature dependence studied, Rietveld refinement, R = 0.0214; RP = 0.0154; wRP = 0.0199
  • Sample Detail(s): sample prepared from La2O3, Al2O3, GeO2 (α-quartz), powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: La4.75Al0.25Ge2.75O13
  • Alphabetic Formula: Al0.25Ge2.75La4.75O13
  • Published Formula: La9.50.5(Ge5.5Al0.5O24)O2
  • Refined Formula: Al0.25Ge2.75La4.75O13
  • Wyckoff Sequence: 176,i2h4fa
  • Z Formula Units: 2
  • Density: ρ = 5.61 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

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_1321574

  • 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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