Inorganic Solid Phases

La9.67(SiO4)6O2.5, La9.52(SiO4)6O2.28 (La4.67[SiO4]3O, T = 3 K) Crystal Structure

General Information

  • Phase Label(s): La4.67[SiO4]3O
  • Structure Class(es): apatite family
  • Classification by Properties: semiconductor, superionic conductor
  • Mineral Name(s):
  • Pearson Symbol: hP42
  • Space Group: 176
  • Phase Prototype: La4.67[SiO4]3O
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; France, Saclay, Laboratoire Léon Brillouin LLB, ORPHEE reactor, 3T2 (determination of structural parameters), neutrons; λ = 0.12251 nm (determination of cell and structural parameters), T = 3 K (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): orthosilicate, oxide
  • Interpretation Detail(s): complete structure determined; temperature dependence studied, Rietveld refinement, RP = 0.0226; wRP = 0.0280
  • Sample Detail(s): sample prepared from La2O3, SiO2, inductive coupled plasma method; 69.1(28) wt.% La, 8.6(9) wt.% Si, powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: La4.76[SiO4]3O1.14
  • Alphabetic Formula: La4.76O1.14[SiO4]3
  • Published Formula: La9.67(SiO4)6O2.5, La9.52(SiO4)6O2.28
  • Refined Formula: La4.76O13.14Si3
  • Wyckoff Sequence: 176,i2h4fe
  • Z Formula Units: 2
  • Density: ρ = 5.42 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_1223079

  • 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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