Inorganic Solid Phases

Na2Be2Si6O15·H2O, eudidymite (Na2Be2Si6O15[H2O] mon) Crystal Structure

General Information

  • Phase Label(s): Na2Be2Si6O15[H2O] mon
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): eudidymite
  • Pearson Symbol: mS104
  • Space Group: 15
  • Phase Prototype: Na2Be2Si6O15[H2O]
  • Measurement Detail(s): automatic diffractometer; 377 (determination of cell parameters), automatic diffractometer; France, Grenoble, Institut Laue-Langevin ILL, D9 (determination of structural parameters), neutrons; λ = 0.08362(2) nm (determination of cell and structural parameters), T = 298 K (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): silicate, hydrate
  • Interpretation Detail(s): complete structure determined, full-matrix least-squares refinement; 136 variables; 1732 reflections; F > 4σ(F), R = 0.0478; wR = 0.0991
  • Sample Detail(s): eudidymite sample from Malawi (Nyasaland), Zomba-Malosa complex, energy-dispersive X-ray analysis, inductive coupled plasma method; 11.40(38) wt.% Na2O, 0.49(7) wt.% K2O, 10.15(7) wt.% BeO, 0.06(2) wt.% CaO, 0.11(5) wt.% Fe2O3, 0.30(8) wt.% Al2O3, 73.10(41) wt.% SiO2, 3.81(3) wt.% H2O, single crystal (determination of cell parameters), single crystal, 0.2×2×5 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: Na2Be2Si6O15[H2O]
  • Alphabetic Formula: Be2[H2O]Na2O15Si6
  • Published Formula: Na2Be2Si6O15·H2O, eudidymite
  • Refined Formula: Be2H2Na2O16Si6
  • Wyckoff Sequence: 15,f13e
  • Z Formula Units: 4
  • Density: ρ = 2.57 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
U [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_1927830

  • 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

    Citation copied