Inorganic Solid Phases

Ba1−xKxFe2As2, x= 0.125 (K0.25Ba0.75Fe2As2 lt, T = 1.7 K) Crystal Structure

General Information

  • Phase Label(s): K0.25Ba0.75Fe2As2 lt
  • Structure Class(es): BaAl4 family
  • Classification by Properties: antiferromagnet AFM, diamagnetic, metal, spin glass, spin-density wave state SD
  • Mineral Name(s):
  • Pearson Symbol: oF20
  • Space Group: 69
  • Phase Prototype: SrRh2As2
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; United Kingdom, Chilton-Didcot, Rutherford Appleton Laboratory, ISIS Facility, HRPD (determination of structural parameters), neutrons, time-of-flight (determination of cell and structural parameters), T = 1.7 K (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): arsenide
  • Interpretation Detail(s): complete structure determined; composition dependence studied, Rietveld refinement
  • Sample Detail(s): sample prepared from BaAs, Fe2As, KAs, inductive coupled plasma method; K content analyzed: Ba1−xKxFe2As2, x= 0.114(2), powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: K0.125Ba0.875Fe2As2
  • Alphabetic Formula: As2Ba0.875Fe2K0.125
  • Published Formula: Ba1−xKxFe2As2, x= 0.125
  • Refined Formula: As2Ba0.88Fe2K0.13
  • Wyckoff Sequence: 69,ifa
  • Z Formula Units: 4
  • Density: ρ = 6.34 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

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1228439

  • 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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