A Sodium Molybdenyl Monophosphate with an Intersecting Tunnel Structure: Na3(MoO)2(PO4)3

✍ Scribed by S. Ledain; A. Leclaire; M.M. Borel; B. Raveau

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 776 KB
• Volume: 132
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1997.7416

✦ Synopsis

A new sodium molybdenyl monophosphate Na 3 (MoO) 2 (PO 4 ) 3 has been synthesized. It crystallizes in the space group C2/c with a ‫؍‬ 15.211(2) A s s , b ‫؍‬ 8.909(1) A s s , c ‫؍‬ 9.362(1) A s s , and ‫؍‬ 115°°99(1). The [Mo 2 P 3 O 14 ] three-dimensional framework can be described from isolated MoO 6 octahedra connected through monophosphate groups, forming [Mo 2 P 3 O 14 ] ribbons running along b. The most stricking feature concerns the exceptional opened character of this structure. It exhibits large 10sided tunnels running along c and interconnected through large octahedral windows; moreover the latter intersect with 6-sided tunnels running along [101] and [101 ]. The distribution of the sodium cations in these tunnels and their coordination are described; their high thermal factors up to 7 A s 2 suggest a possibility of ionic mobility. A comparison with the other sodium Mo(V) phosphates known to date is presented.