Inorganic Solid Phases

Ca4Al8Si8O32·16H2O (Ca4Al8[SiO4]8[H2O]18) Crystal Structure

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General Information

  • Phase Label(s): Ca4Al8[SiO4]8[H2O]18
  • Structure Class(es): zeolite GIS
  • Classification by Properties: –
  • Mineral Name(s): gismondine
  • Pearson Symbol: mP72
  • Space Group: 14
  • Phase Prototype: Ca4Al8[SiO4]8[H2O]16
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; France, Grenoble, European Synchrotron Radiation Facility ESRF, SNBL, BM01A (determination of structural parameters), X-rays, synchrotron; λ = 0.07 nm (determination of cell and structural parameters), p = 0.0001 GPa (determination of cell and structural parameters)
  • Phase Class(es): –
  • Compound Class(es): orthosilicate, hydrate
  • Interpretation Detail(s): positions of non-H atoms determined; pressure dependence studied, Rietveld refinement; 109 variables, RP = 0.0036; wRP = 0.0052
  • Sample Detail(s): gismondine sample from Ireland, Ballyclare, chemical analysis; K0.03Na0.22Ca3.77Al7.53Si8.41O32[H2O]17.76 at ambient conditions, powder (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: Ca4Al8[SiO4]8[H2O]16
  • Alphabetic Formula: Al8Ca4[H2O]16[SiO4]8
  • Published Formula: Ca4Al8Si8O32·16H2O
  • Refined Formula: Al8Ca4H31.80O47.90Si8
  • Wyckoff Sequence: 14,e20
  • Z Formula Units: 1
  • Density: ρ = 2.23 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
U [nm2]
Type
Computed
Beq [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1221488

  • 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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