Inorganic Solid Phases

Na2Ti2O2[NaTiO(Si2O7)]2·4H2O (Na2Ti2[Si2O7]O2[H2O]2) Crystal Structure

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General Information

  • Phase Label(s): Na2Ti2[Si2O7]O2[H2O]2
  • Structure Class(es): –
  • Classification by Properties: –
  • Mineral Name(s): murmanite
  • Pearson Symbol: aP34
  • Space Group: 2
  • Phase Prototype: Na2Ti2[Si2O7]O2[H2O]2
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Philips P21 (determination of structural parameters), X-rays, Mo Kα (determination of cell and structural parameters)
  • Phase Class(es): –
  • Compound Class(es): disilicate, oxide, hydrate
  • Interpretation Detail(s): positions of non-H atoms determined, trial-and-error, R = 0.075
  • Sample Detail(s): murmanite sample from Russia, Kola Peninsula, Lovozero massif, chemical analysis; (Na2.24K0.11Ca0.39)(Ti2.74Nb0.42Ta0.03Mn0.26Fe0.47Mg0.08)4Si4H4O22.59F0.08, single crystal (determination of cell and structural parameters)

Substance Summary

  • Standard Formula: Na2Ti2[Si2O7]O2[H2O]2
  • Alphabetic Formula: [H2O]2Na2O2[Si2O7]Ti2
  • Published Formula: Na2Ti2O2[NaTiO(Si2O7)]2·4H2O
  • Refined Formula: H4Na2O11Si2Ti2
  • Wyckoff Sequence: 1,a34
  • Z Formula Units: 2
  • Density: ρ = 2.86 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
B [nm2]
Type
Computed
Beq [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1923725

  • 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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