A Sodium Mo(V) Monophosphate with a Tunnel Structure: Na3(MoO)4(PO4)5

✍ Scribed by A. Leclaire; T. Hoareau; M.M. Borel; A. Grandin; B. Raveau

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 436 KB
• Volume: 114
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1995.1083

✦ Synopsis

A new molybdenum monophosphate (\mathrm{Na}{3}\left(\mathrm{MoO}{4}\right){4}\left(\mathrm{PO}{4}\right){5}) has been synthesized. It crystallizes in the space group (\mathrm{C} 2 / \mathrm{c}) with (a=16.789(1), b=8.500(1), c=16.361(1) \AA, \beta=126.34(1)^{\circ}). Its tridimensional framework can be described by the stacking along (b) from (\left[\mathrm{Mo}{4} \mathrm{P}{5} \mathrm{O}{24}\right]{\infty}) layers sharing the apices of their polyhedra and forming cross-shaped tunnels running along that direction. The sodium ions are located on the walls of the tunnels, near large windows that allow a communication between two adjacent tunnels. Molybdenum exhibits an octahedral coordination, characteristic of (M o(V)), i.e., with an abnormally short (\mathrm{Mo} \sim \mathrm{O}) bond corresponding to one free apex for each (\mathrm{MoO}{6}) octahedron. O 1995 Academic Press, Inc.