Inorganic Solid Phases

(Na2−xx)Na6Al8−xSi8+xO32, x= 1.7 (Na4Al4[SiO4]4 nep) Crystal Structure

General Information

  • Phase Label(s): Na4Al4[SiO4]4 nep
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): nepheline
  • Pearson Symbol: hP64
  • Space Group: 173
  • Phase Prototype: Na3.6(Al0.9Si0.1)4[SiO4]4
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Enraf-Nonius CAD4 (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): orthosilicate
  • Interpretation Detail(s): complete structure determined; composition dependence studied, least-squares refinement; 4798 reflections, wR = 0.0223
  • Sample Detail(s): nepheline sample from synthetic, single crystal (determination of cell parameters), single crystal, 0.66 mm diameter (determination of structural parameters)

Substance Summary

  • Standard Formula: Na3.2Al3.2Si4.8O16
  • Alphabetic Formula: Al3.2Na3.2O16Si4.8
  • Published Formula: (Na2−xx)Na6Al8−xSi8+xO32, x= 1.7
  • Refined Formula: Al3.15Na3.40O16Si4.85
  • Wyckoff Sequence: 173,c10b2
  • Z Formula Units: 2
  • Density: ρ = 2.55 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

Anisotropic

Site
β11 [nm2]
β22 [nm2]
β33 [nm2]
β12 [nm2]
β13 [nm2]
β23 [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1409371

  • 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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