Inorganic Solid Phases

MgHPxAs1−xO4·7H2O, x= 0.5 (HMg[AsO4]0.5[PO4]0.5[H2O]7) Crystal Structure

General Information

  • Phase Label(s): HMg[AsO4]0.5[PO4]0.5[H2O]7
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s):
  • Pearson Symbol: mS104
  • Space Group: 15
  • Phase Prototype: HMg[AsO4][H2O]7
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), X-rays, Cu Kα (determination of cell parameters)
  • Phase Class(es):
  • Compound Class(es): arsenate, orthophosphate, hydrate
  • Interpretation Detail(s): cell parameters determined and structure type assigned; composition dependence studied
  • Sample Detail(s): sample prepared from MgSO4, Na2HPO4, Na2HAsO4, colorimetry, iodometric titration, titration; 9.02 wt.% Mg, 5.75 wt.% P, 13.9 wt.% As, 71.33 wt.%, powder (determination of cell parameters)

Substance Summary

  • Standard Formula: HMg[AsO4]0.5[PO4]0.5[H2O]7
  • Alphabetic Formula: [AsO4]0.5H[H2O]7Mg[PO4]0.5
  • Published Formula: MgHPxAs1−xO4·7H2O, x= 0.5
  • Refined Formula:
  • Wyckoff Sequence:
  • Z Formula Units: 8
  • Density: ρ = 1.84 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.

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1030222

  • 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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