Inorganic Solid Phases

REE-rich piemontite (Ca1.51La0.23Ce0.057Mn1.005Fe0.4Al1.798[SiO4][Si2O7]O[OH]) Crystal Structure

General Information

  • Phase Label(s): Ca1.51La0.23Ce0.057Mn1.005Fe0.4Al1.798[SiO4][Si2O7]O[OH]
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): piemontite
  • Pearson Symbol: mP42
  • Space Group: 11
  • Phase Prototype: Ca2FeAl2[SiO4][Si2O7]O[OH]
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Enraf-Nonius CAD4 (determination of structural parameters), X-rays, Mo Kα; λ = 0.071069 nm (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, orthosilicate, disilicate, oxide
  • Interpretation Detail(s): complete structure determined, full-matrix least-squares refinement; 1652 reflections; F > 8σ(F), R = 0.021; wR = 0.019
  • Sample Detail(s): piemontite sample from Italy, Apuan Alps, Tuscany, Monte Brugiana, La Rocchetta, sample prepared from piemontite, electron microprobe analysis, secondary ion mass spectrometry; Si2.989Al1.760Mg0.083Mn0.959Fe0.392Ca1.532Sr0.024La0.142Ce0.041Pr0.019Nd0.053Sm0.003Th0.003O13H, single crystal (determination of cell parameters), single crystal, 0.06×0.16×0.19 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: Ca1.556La0.203Ce0.058Mn0.985Fe0.402Al1.796[SiO4][Si2O7]O[OH]
  • Alphabetic Formula: Al1.796Ca1.556Ce0.058Fe0.402La0.203Mn0.985O[OH][SiO4][Si2O7]
  • Published Formula: REE-rich piemontite
  • Refined Formula: Al1.75Ca1.53Ce0.06Fe0.39HLa0.20Mg0.08Mn0.96O13Si3Sr0.02
  • Wyckoff Sequence: 11,f3e13ca
  • Z Formula Units: 2
  • Density: ρ = 3.69 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_1601878

  • 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

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