Inorganic Solid Phases

Sc2Si2O7 (Sc2[Si2O7] rt) Crystal Structure

General Information

  • Phase Label(s): Sc2[Si2O7] rt
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): thortveitite
  • Pearson Symbol: mS22
  • Space Group: 12
  • Phase Prototype: Sc2[Si2O7]
  • Measurement Detail(s): Straumanis film (determination of cell parameters), Weissenberg photographs (determination of structural parameters)
  • Phase Class(es):
  • Compound Class(es): disilicate
  • Interpretation Detail(s): complete structure determined, R = 0.0283
  • Sample Detail(s): thortveitite sample from Norway, Nedenäs, Saetersdalen, Iverland, chemical analysis; 45.45 mol.% SiO2, 42.06 mol.% Sc2O3, 8.89 mol.% Y2O3, 2.83 mol.% Fe2O3 and 0.51 mol.% BeO, powder (determination of cell parameters), single crystal (determination of structural parameters)

Substance Summary

  • Standard Formula: Sc2[Si2O7]
  • Alphabetic Formula: Sc2[Si2O7]
  • Published Formula: Sc2Si2O7
  • Refined Formula: O7Sc2Si2
  • Wyckoff Sequence: 12,ji2gc
  • Z Formula Units: 2
  • Density: ρ = 3.37 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
U11 [nm2]
U22 [nm2]
U33 [nm2]
2U12 [nm2]
2U13 [nm2]
2U23 [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1401211

  • 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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