Schaurteite, Ca3Ge(SO4)2(OH) 6·3H2O

Marcus J. Origlieri, Robert T. Downs

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

This report presents the first crystal structure determination of the mineral schaurteite, ideally Ca3Ge(SO4)2(OH)6·3H2O, tricalcium germanium bis(sulfate) hexahydroxide trihydrate. This single-crystal X-ray diffraction study investigated a natural sample from the type locality at Tsumeb, Namibia. Schaurteite is a member of the fleischerite group of minerals, which also includes fleischerite, despujolsite, and mallestigite. The structure of schaurteite consists of slabs of Ca(O,OH,H2O)8 polyhedra (site symmetry mm2) interleaved with a mixed layer of Ge(OH)6 octahedra (-3m.) and SO4 tetrahedra (3m.). There are two H atoms in the asymmetric unit, both located by full-matrix refinement, and both forming O - H⋯O hydrogen bonds.

Original languageEnglish (US)
Pages (from-to)i6
JournalActa Crystallographica Section E: Structure Reports Online
Volume69
Issue number2
DOIs
StatePublished - Feb 1 2013

Keywords

  • R factor = 0.022
  • T = 296 K
  • data-to-parameter ratio = 15.3
  • mean σ(S-O) = 0.002 Å
  • single-crystal X-ray study
  • wR factor = 0.045

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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