Crystal structure of new high-pressure strontium germanate SrGe₂O₅

Abstract

Single crystals of new high-pressure strontium germanate SrGe₂O₅ have successfully been grown at high-pressure and high-temperature. The single-crystal X-ray diffraction analysis of this compound was conducted at room temperature (296 K). The determined crystal structure consists of germanium-oxygen framework layers stacked along [001] with Sr atoms located at 12-fold coordinated cuboctahedral site; the layers are formed by the corner-linkages between GeO₆ octahedra and between GeO₆ octahedra and GeO₄ tetrahedra.