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Na(4)FeFe(PO(4))(3), a new synthetic NASICON-type phosphate.

Hatert F - Acta Crystallogr Sect E Struct Rep Online (2009)

Bottom Line: This paper reports the crystal structure of tetra-sodium diiron tris(phosphate), Na(4)Fe(2+)Fe(3+)(PO(4))(3), which has been synthesized hydro-thermally at 773 K and 0.1 GPa.The crystal structure has been refined in the space group Rc and is identical to that of γ-NASICON.The Na(+) cations are distributed over two crystallographic sites: the six-coordinated Na1 site which lies between two 'lantern units', and the eight-coordinated Na2 site which lies at the same z value as the P site.

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Affiliation: University of Liège, Laboratory of Mineralogy B.18, B-4000 Liège, Belgium.

ABSTRACT
This paper reports the crystal structure of tetra-sodium diiron tris(phosphate), Na(4)Fe(2+)Fe(3+)(PO(4))(3), which has been synthesized hydro-thermally at 773 K and 0.1 GPa. The crystal structure has been refined in the space group Rc and is identical to that of γ-NASICON. The heteropolyhedral framework is based on a regular alternation, in three dimensions, of corner-sharing PO(4) tetra-hedra and FeO(6) octa-hedra, constituting so-called 'lantern units' stacked along the c axis. The Na(+) cations are distributed over two crystallographic sites: the six-coordinated Na1 site which lies between two 'lantern units', and the eight-coordinated Na2 site which lies at the same z value as the P site.

No MeSH data available.


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Fragment of the Na4Fe2+Fe3+(PO4)3 structure (50% displacement ellipsoids) showing the bonding environments of the Fe and P cations. [Symmetry codes: (i) 2/3 + x - y, 1/3 - y, 1/3 - z; (ii) 2/3 - x, 1/3 - x + y, 1/3 - z; (iii) 2/3 + y, 1/3 + x, 1/3 - z; (iv) x, -y - 1/3, z; (v) x, x - y, 1/6 -z; (vi) 1/3 + y, 2/3 - x + y, 1/6 - z; (vii) 2/3 - y, 1/3 + x - y, z - 1/6; (viii) -y, -x, z; (ix) x + 2/3, y + 1/3, 1/3 - z.]
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Fap1: Fragment of the Na4Fe2+Fe3+(PO4)3 structure (50% displacement ellipsoids) showing the bonding environments of the Fe and P cations. [Symmetry codes: (i) 2/3 + x - y, 1/3 - y, 1/3 - z; (ii) 2/3 - x, 1/3 - x + y, 1/3 - z; (iii) 2/3 + y, 1/3 + x, 1/3 - z; (iv) x, -y - 1/3, z; (v) x, x - y, 1/6 -z; (vi) 1/3 + y, 2/3 - x + y, 1/6 - z; (vii) 2/3 - y, 1/3 + x - y, z - 1/6; (viii) -y, -x, z; (ix) x + 2/3, y + 1/3, 1/3 - z.]


Na(4)FeFe(PO(4))(3), a new synthetic NASICON-type phosphate.

Hatert F - Acta Crystallogr Sect E Struct Rep Online (2009)

Fragment of the Na4Fe2+Fe3+(PO4)3 structure (50% displacement ellipsoids) showing the bonding environments of the Fe and P cations. [Symmetry codes: (i) 2/3 + x - y, 1/3 - y, 1/3 - z; (ii) 2/3 - x, 1/3 - x + y, 1/3 - z; (iii) 2/3 + y, 1/3 + x, 1/3 - z; (iv) x, -y - 1/3, z; (v) x, x - y, 1/6 -z; (vi) 1/3 + y, 2/3 - x + y, 1/6 - z; (vii) 2/3 - y, 1/3 + x - y, z - 1/6; (viii) -y, -x, z; (ix) x + 2/3, y + 1/3, 1/3 - z.]
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2969012&req=5

Fap1: Fragment of the Na4Fe2+Fe3+(PO4)3 structure (50% displacement ellipsoids) showing the bonding environments of the Fe and P cations. [Symmetry codes: (i) 2/3 + x - y, 1/3 - y, 1/3 - z; (ii) 2/3 - x, 1/3 - x + y, 1/3 - z; (iii) 2/3 + y, 1/3 + x, 1/3 - z; (iv) x, -y - 1/3, z; (v) x, x - y, 1/6 -z; (vi) 1/3 + y, 2/3 - x + y, 1/6 - z; (vii) 2/3 - y, 1/3 + x - y, z - 1/6; (viii) -y, -x, z; (ix) x + 2/3, y + 1/3, 1/3 - z.]
Bottom Line: This paper reports the crystal structure of tetra-sodium diiron tris(phosphate), Na(4)Fe(2+)Fe(3+)(PO(4))(3), which has been synthesized hydro-thermally at 773 K and 0.1 GPa.The crystal structure has been refined in the space group Rc and is identical to that of γ-NASICON.The Na(+) cations are distributed over two crystallographic sites: the six-coordinated Na1 site which lies between two 'lantern units', and the eight-coordinated Na2 site which lies at the same z value as the P site.

View Article: PubMed Central - HTML - PubMed

Affiliation: University of Liège, Laboratory of Mineralogy B.18, B-4000 Liège, Belgium.

ABSTRACT
This paper reports the crystal structure of tetra-sodium diiron tris(phosphate), Na(4)Fe(2+)Fe(3+)(PO(4))(3), which has been synthesized hydro-thermally at 773 K and 0.1 GPa. The crystal structure has been refined in the space group Rc and is identical to that of γ-NASICON. The heteropolyhedral framework is based on a regular alternation, in three dimensions, of corner-sharing PO(4) tetra-hedra and FeO(6) octa-hedra, constituting so-called 'lantern units' stacked along the c axis. The Na(+) cations are distributed over two crystallographic sites: the six-coordinated Na1 site which lies between two 'lantern units', and the eight-coordinated Na2 site which lies at the same z value as the P site.

No MeSH data available.


Related in: MedlinePlus