Ontology highlight
ABSTRACT:
SUBMITTER: Posner ES
PROVIDER: S-EPMC3274841 | biostudies-other | 2012 Feb
REPOSITORIES: biostudies-other
Posner Esther S ES Konzett Jürgen J Frost Daniel J DJ Downs Robert T RT Yang Hexiong H
Acta crystallographica. Section E, Structure reports online 20120131 Pt 2
The title compound, (sodium magnesium) [magnesium iron(III) silicon] disilicate, (Na(0.97)Mg(0.03))(Mg(0.43)Fe(0.17) (3+)Si(0.40))Si(2)O(6), is isotypic with ordered P2/n omphacite. Its structure is characterized by single chains of corner-sharing SiO(4) tetra-hedra, extending along the c axis, which are crosslinked by bands of edge-sharing octa-hedra (site symmetry 2), statistically occupied by (Mg(2+) + Fe(3+) + Si(4+)). Between the bands built up of the octahedra are two non-equivalent highly ...[more]