ChemInform Abstract: The New High-Pressure Borate Co7B24O42 (OH)2·2H2O — Formation of Edge-Sharing BO4 Tetrahedra in a Hydrate Borate.

✍ Scribed by Stephanie C. Neumair; Reinhard Kaindl; Hubert Huppertz

• Publisher: John Wiley and Sons
• Year: 2012
• Weight: 21 KB
• Volume: 43
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.201213023

✦ Synopsis

Hydrate Borate. -Violet, air-and water-resistant crystals of the title compound are synthesized from a stoichiometric mixture of Co3O4 and H3BO3 (Walker-type multianvil apparatus, 6 GPa, 880 °C, 5 min). The new high--pressure phase is characterized by powder and single crystal XRD, IR, and Raman spectroscopy. The compound crystallizes in the orthorhombic space group Pbam with Z = 2. The structure is built up from corner-sharing BO4 tetrahedra forming corrugated layers, which are interconnected by two edge-sharing BO4 tetrahedra (B2O6 units) forming Z-shaped channels.