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ChemInform Abstract: Structure and 31P NMR Spectroscopy of a New Phosphate, Na8Ca1.5Mg12.5 (PO4)12.

✍ Scribed by Hasna Jerbi; Mourad Hidouri; Mohamed Rzeigui; Mongi Ben Amara

Book ID: 102064305
Publisher: John Wiley and Sons
Year: 2011
Weight: 20 KB
Volume: 42
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.201125002

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✦ Synopsis

Structure and 31 P NMR Spectroscopy of a New Phosphate, Na 8 Ca 1.5 Mg 12.5 (PO 4 ) 12 .

-The new title compound is synthesized by reaction of NH4H2PO4, Na2CO3, CaCO3, and MgCO3 in a flux of Na2MoO4 (Pt crucible, 673 K for 24 h, 873 K for 12 h, and 1273 K for 2 h). The compound is characterized by single crystal XRD and 31 P NMR spectroscopy. It crystallizes in the monoclinic space group P21/n with Z = 4. The structure consists of MgO x (x = 5, 6) and MO 7 (M: Mg, Na) polyhedra linked through common corners or edges to form a rigid three-dimensional skeleton, reinforced by corner--sharing between identical Mg12MO48 units. These units are connected by PO4 tetrahedra forming cavities and crossing tunnels in which the Na + and Ca 2+ cations are located.

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