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Schaurteite, Ca(3)Ge(SO(4))(2)(OH)(6)·3H(2)O.

Origlieri MJ, Downs RT - Acta Crystallogr Sect E Struct Rep Online (2013)

Bottom Line: 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,H(2)O)(8) polyhedra (site symmetry mm2) inter-leaved with a mixed layer of Ge(OH)(6) octa-hedra (-3m.) and SO(4) tetra-hedra (3m.).There are two H atoms in the asymmetric unit, both located by full-matrix refinement, and both forming O-H⋯O hydrogen bonds.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA.

ABSTRACT
This report presents the first crystal structure determination of the mineral schaurteite, ideally Ca(3)Ge(SO(4))(2)(OH)(6)·3H(2)O, tricalcium germanium bis-(sulfate) hexa-hydroxide 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,H(2)O)(8) polyhedra (site symmetry mm2) inter-leaved with a mixed layer of Ge(OH)(6) octa-hedra (-3m.) and SO(4) tetra-hedra (3m.). There are two H atoms in the asymmetric unit, both located by full-matrix refinement, and both forming O-H⋯O hydrogen bonds.

No MeSH data available.


Related in: MedlinePlus

Ellipsoidal view of the schaurteite structure down [001], showing red O atoms, yellow S atoms, green Ge atoms, and light blue Ca atoms. Unit cell outline shown in black. The large circular ellipsoid at [2/3,1/3,z] represents the O1 atom (3 m. symmetry), which forms the apex of a rigid SO4 tetrahedron with significant translation (0.73 Å) and libration (7.97°).
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Fap4: Ellipsoidal view of the schaurteite structure down [001], showing red O atoms, yellow S atoms, green Ge atoms, and light blue Ca atoms. Unit cell outline shown in black. The large circular ellipsoid at [2/3,1/3,z] represents the O1 atom (3 m. symmetry), which forms the apex of a rigid SO4 tetrahedron with significant translation (0.73 Å) and libration (7.97°).


Schaurteite, Ca(3)Ge(SO(4))(2)(OH)(6)·3H(2)O.

Origlieri MJ, Downs RT - Acta Crystallogr Sect E Struct Rep Online (2013)

Ellipsoidal view of the schaurteite structure down [001], showing red O atoms, yellow S atoms, green Ge atoms, and light blue Ca atoms. Unit cell outline shown in black. The large circular ellipsoid at [2/3,1/3,z] represents the O1 atom (3 m. symmetry), which forms the apex of a rigid SO4 tetrahedron with significant translation (0.73 Å) and libration (7.97°).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3569170&req=5

Fap4: Ellipsoidal view of the schaurteite structure down [001], showing red O atoms, yellow S atoms, green Ge atoms, and light blue Ca atoms. Unit cell outline shown in black. The large circular ellipsoid at [2/3,1/3,z] represents the O1 atom (3 m. symmetry), which forms the apex of a rigid SO4 tetrahedron with significant translation (0.73 Å) and libration (7.97°).
Bottom Line: 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,H(2)O)(8) polyhedra (site symmetry mm2) inter-leaved with a mixed layer of Ge(OH)(6) octa-hedra (-3m.) and SO(4) tetra-hedra (3m.).There are two H atoms in the asymmetric unit, both located by full-matrix refinement, and both forming O-H⋯O hydrogen bonds.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA.

ABSTRACT
This report presents the first crystal structure determination of the mineral schaurteite, ideally Ca(3)Ge(SO(4))(2)(OH)(6)·3H(2)O, tricalcium germanium bis-(sulfate) hexa-hydroxide 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,H(2)O)(8) polyhedra (site symmetry mm2) inter-leaved with a mixed layer of Ge(OH)(6) octa-hedra (-3m.) and SO(4) tetra-hedra (3m.). There are two H atoms in the asymmetric unit, both located by full-matrix refinement, and both forming O-H⋯O hydrogen bonds.

No MeSH data available.


Related in: MedlinePlus