Inorganic Solid Phases

(Y2.12Tm0.88)2{Al2(OH)3[H1.48Si1.88O7][SiO4][SiO3(OH)]}2; (Y2.12Tm0.88)2{Al2(OH)3{SiO3[SiO3(OH)]0.88[H5O4]0.12}[SiO4][SiO3(OH)]}2 (H2.48Y2.12Tm0.88Al2Si1.88[SiO4]2O7[OH]3, T = 100 K) Crystal Structure

General Information

  • Phase Label(s): H2.48Y2.12Tm0.88Al2Si1.88[SiO4]2O7[OH]3
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): vyuntspakhkite-(Y)
  • Pearson Symbol: mP108
  • Space Group: 14
  • Phase Prototype: H2.48(Y0.71Tm0.29)3Al2Si1.88[SiO4]2O7[OH]3
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Bruker AXS SMART (determination of structural parameters), X-rays, Mo Kα; λ = 0.071073 nm (determination of cell and structural parameters), T = 100 K (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, orthosilicate, silicate
  • Interpretation Detail(s): complete structure determined, full-matrix least-squares refinement; 263 variables; 2298 reflections; I > 1.96σ(I), R = 0.0404; wR = 0.0659
  • Sample Detail(s): vyuntspakhkite sample from Russia, Kola Peninsula, energy-dispersive X-ray analysis; 23.13 wt.% Y2O3, 15.35 wt.% Yb2O3, 6.58 wt.% Er2O3, 3.84 wt.% Dy2O3, 2.49 wt.% Lu2O3, 1.61 wt.% Tm2O3, 0.67 wt.% Ho2O3, 0.32 wt.% Gd2O3, 0.27 wt.% Tb2O3, 12.85 wt.% Al2O3, 29.14 wt.% SiO2, single crystal (determination of cell parameters), single crystal, 0.02×0.04×0.12 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: H2.48Y2.12Tm0.88Al2Si1.88[SiO4]2O7[OH]3
  • Alphabetic Formula: Al2H2.48O7[OH]3Si1.88[SiO4]2Tm0.88Y2.12
  • Published Formula: (Y2.12Tm0.88)2{Al2(OH)3[H1.48Si1.88O7][SiO4][SiO3(OH)]}2; (Y2.12Tm0.88)2{Al2(OH)3{SiO3[SiO3(OH)]0.88[H5O4]0.12}[SiO4][SiO3(OH)]}2
  • Refined Formula: Al2H5O18Si3.88Tm0.94Y2.07
  • Wyckoff Sequence: 14,e27
  • Z Formula Units: 4
  • Density: ρ = 3.93 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]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1629287

  • 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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