Inorganic Solid Phases

Or96Ab4, Nor= 0.964 (K0.5Na0.5AlSi3O8 tricl) Crystal Structure

General Information

  • Phase Label(s): K0.5Na0.5AlSi3O8 tricl
  • Structure Class(es):
  • Classification by Properties: nonmetal
  • Mineral Name(s): anorthoclase/microcline
  • Pearson Symbol: aP26
  • Space Group: 2
  • Phase Prototype: NaAlSi3O8
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Philips PW1100 (determination of structural parameters), X-rays, Mo Kα; λ = 0.071069 nm (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): silicate
  • Interpretation Detail(s): complete structure determined, full-matrix least-squares refinement; 118 variables; 1207 reflections; I > 2.5σ(I), R = 0.047; wR = 0.049
  • Sample Detail(s): microperthite sample from France, Alpes-Maritimes, Argentera Massif, Madone de Fenestre anatexites, electron microprobe analysis; 65.43 wt.% SiO2, 18.65 wt.% Al2O3, 0.04 wt.% Fe2O3, 0.04 wt.% CaO, 2.10 wt.% Na2O, 13.41 wt.% K2O, 0.50 wt.% H2O, 166 ppm Sr, 816 ppm Ba, 302 ppm Rb; amounts of monoclinic K-phase and triclinic Na-phase, single crystal (determination of cell parameters), single crystal, 0.10×0.15×0.25 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: K0.964Na0.036AlSi3O8
  • Alphabetic Formula: AlK0.964Na0.036O8Si3
  • Published Formula: Or96Ab4, Nor= 0.964
  • Refined Formula: AlKO8Si3
  • Wyckoff Sequence: 2,i13
  • Z Formula Units: 2
  • Density: ρ = 2.56 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
B [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_1625888

  • 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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