Inorganic Solid Phases

Mg3.35Si5.51H7.26O18 (H3.64Mg1.68Si2.75O9 hp) Crystal Structure

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General Information

  • Phase Label(s): H3.64Mg1.68Si2.75O9 hp
  • Structure Class(es): –
  • Classification by Properties: –
  • Mineral Name(s): –
  • Pearson Symbol: hP42
  • Space Group: 185
  • Phase Prototype: H3.64Mg1.68Si2.75O9
  • Measurement Detail(s): automatic diffractometer; 17 (determination of cell parameters), automatic diffractometer; Japan, Tsukuba, High Energy Accelerator Research Organization (KEK), Photon Factory, BL-10A (determination of structural parameters), X-rays, synchrotron; λ = 0.07065 nm (determination of cell and structural parameters)
  • Phase Class(es): –
  • Compound Class(es): silicate
  • Interpretation Detail(s): positions of non-H atoms determined, full-matrix least-squares refinement; 85 reflections, R = 0.115; wR = 0.123
  • Sample Detail(s): sample prepared from SiO2, Mg[OH]2, electron microprobe analysis; Mg3.35Si5.51H7.26O18; 25.4 wt.% MgO, 62.3 wt.% SiO2, 12.3 wt.% H2O, single crystal (determination of cell parameters), single crystal, 0.018×0.024×0.030 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: H3.64Mg1.68Si2.75O9
  • Alphabetic Formula: H3.64Mg1.68O9Si2.75
  • Published Formula: Mg3.35Si5.51H7.26O18
  • Refined Formula: Mg2.34O9Si3.18
  • Wyckoff Sequence: 185,c4b3a3
  • Z Formula Units: 2
  • Density: ρ = 2.83 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]

Powder Pattern

published defraction line
d [Å]
computed diffraction line for Cu Kα
d [nm]
intensity
I [1]
h [1]
k [1]
l [1]
Radiation
Remark

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1004466

  • 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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