Inorganic Solid Phases

Pb4.25La0.50Ta10O30 (La0.25Ta5Pb2.125O15 lt) Crystal Structure

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General Information

  • Phase Label(s): La0.25Ta5Pb2.125O15 lt
  • Structure Class(es): tetragonal bronze
  • Classification by Properties: ferroelectric FE, nonmetal
  • Mineral Name(s): –
  • Pearson Symbol: tP54
  • Space Group: 127
  • Phase Prototype: KTa5Pb2O15
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Philips X'Pert PRO MPD PW3040 (determination of structural parameters), X-rays, Cu Kα; λ = 0.15418 nm (determination of cell parameters), X-rays, Cu Kα (determination of structural parameters)
  • Phase Class(es): –
  • Compound Class(es): oxide
  • Interpretation Detail(s): complete structure determined, Rietveld refinement; 29 variables; 285 reflections, RP = 0.166; RB = 0.078
  • Sample Detail(s): sample prepared from La2O3, PbO, Ta2O5, considering weight loss during preparation; weight loss during preparation < 1 wt.%, powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: La0.25Ta5Pb2.125O15
  • Alphabetic Formula: La0.25O15Pb2.125Ta5
  • Published Formula: Pb4.25La0.50Ta10O30
  • Refined Formula: La0.25O15Pb2.12Ta5
  • Wyckoff Sequence: 127,j3i2hgdca
  • Z Formula Units: 2
  • Density: ρ = 8.93 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
B [nm2]
Type
Computed
Beq [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1614229

  • 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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