Structure and 31P NMR spectroscopy of a new phosphate, Na8Ca1.5Mg12.5(PO4)12

Structure and 31P NMR spectroscopy of a new phosphate, Na8Ca1.5Mg12.5(PO4)12

A new phosphate, sodium calcium magnesium tetrakis(phosphate), Na8Ca1.5Mg12.5(PO4)12, has been synthesized by a flux method. Its novel structure consists of MgOx (x = 5 and 6) polyhedra and MO7 (M = Mg or Na) octahedra linked directly through common corners or edges to form a rigid three‐dimensional...

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Veröffentlicht in:Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2011-03, Vol.67 (3), p.i17-i20
Hauptverfasser: Jerbi, Hasna, Hidouri, Mourad, Rzeigui, Mohamed, Ben Amara, Mongi
Format: Artikel
Sprache:eng
Schlagworte:
Cations
Chemical bonds
Crystal structure
Crystallography
Magnesium
NMR
NMR spectroscopy
Nuclear magnetic resonance
Phosphates
Spectroscopy
Spectrum analysis
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Beschreibung
Zusammenfassung:A new phosphate, sodium calcium magnesium tetrakis(phosphate), Na8Ca1.5Mg12.5(PO4)12, has been synthesized by a flux method. Its novel structure consists of MgOx (x = 5 and 6) polyhedra and MO7 (M = Mg or Na) octahedra linked directly through common corners or edges to form a rigid three‐dimensional skeleton, reinforced by corner‐sharing between identical Mg12MO48 units. The connection of these units by the PO4 tetrahedra induces cavities and crossing tunnels where the Na+ and Ca2+ cations are located. This structural model was supported by a 31P NMR spectroscopy study which confirmed the existence of 12 crystallographically independent sites for the P atoms.
ISSN:0108-2701
1600-5759
DOI:10.1107/S0108270110054521