First Example of Molybdenum Atoms in the Network of High Temperature Chevrel Phases: Moy[Mo6Se8+xSx]

✍ Scribed by Stéphanie Belin; Roger Chevrel; Marcel Sergent

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 222 KB
• Volume: 145
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8234

✦ Synopsis

In the literature Mo 6 Se 8؊x S x (04x44) Chevrel phase binaries are stable compounds, synthesized by solid state reaction from stoichiometric mixture of MoS 2 , MoSe 2 , and Mo powders at 12003C. We report the single-crystal structure of these compounds. The structural determinations show as expected a classical Chevrel phase structure with a framework of pseudomolecular Mo 6 Se 8؊x S x cubic units but furthermore exhibit molybdenum atoms in the channels of the host structure of these compounds, leading to the new formula Mo y [Mo 6 Se 8؊x S x ] with 04x45 and y&0.3. These extra molybdenum atoms stabilize the Chevrel phase host network and seem to be linking with a molybdenum atom of the Mo 6 cluster, forming a kind of Mo 7 cluster.