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The iron phosphate NaBaFe(2)(PO(4))(3).

ABSTRACT: A new iron phosphate, sodium barium diiron tris-(phosphate), NaBaFe(2)(PO(4))(3), has been synthesized by the flux method and shown to exhibit the well known langbeinite type structure. The Na, Ba and Fe atoms all lie on threefold axes, while the P and O atoms occupy general positions, one of the O atoms being disordered over two positions, with site occupancy factors of ca 0.7 and 0.3. The [Fe(2)(PO(4))(3)](?) framework consists of FeO(6) octa-hedra sharing all their corners with the PO(4) tetra-hedra. The Na(+) and Ba(2+) cations are almost equally distributed over two distinct cavities, in which they occupy slightly different positions.

SUBMITTER: Hidouri M

PROVIDER: S-EPMC2961906 | biostudies-other | 2008

REPOSITORIES: biostudies-other

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The iron phosphate NaBaFe(2)(PO(4))(3).

Hidouri Mourad M Jerbi Hasna H Ben Amara Mongi M

Acta crystallographica. Section E, Structure reports online 20080731 Pt 8

A new iron phosphate, sodium barium diiron tris-(phosphate), NaBaFe(2)(PO(4))(3), has been synthesized by the flux method and shown to exhibit the well known langbeinite type structure. The Na, Ba and Fe atoms all lie on threefold axes, while the P and O atoms occupy general positions, one of the O atoms being disordered over two positions, with site occupancy factors of ca 0.7 and 0.3. The [Fe(2)(PO(4))(3)](∞) framework consists of FeO(6) octa-hedra sharing all their corners with the PO(4) tetr ...[more]

PMID: 21202994

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The iron phosphate CaFe(3)(PO(4))(3)O.

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RbSn(2)(PO(4))(3), a NASICON-type phosphate.

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A novel lithium copper iron phosphate with idealized formula Li(5)Cu(2)Fe(PO(4))(4): crystal structure and distribution of defects.

Project description:Gray-green single crystals were obtained under high-pressure, high-temperature hydro-thermal conditions. A refinement of atom occupancies gave the composition Li(3.68)Cu(2+)Fe(3+)(Cu(0.55)Li(0.45))(2)Fe(2+) (0.15)(PO(4))(4). The structure is built from triplets of edge-sharing (Cu,Li)O(5)-FeO(6)-(Cu,Li)O(5) polyhedra, CuO(4) quadrilaterals and PO(4) tetra-hedra. In the (Cu,Li)O(5) polyhedra the Cu and Li positions are statistically occupied in a 0.551?(2):0.449?(2) ratio. Both FeO(6) and CuO(4) polyhedra exhibit [Formula: see text] symmetry. The positions of additional Li atoms with vacancy defects are in the inter-stices of the framework.

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Synthesis and crystal structure of a new alluaudite-like iron phosphate Na2CaMnFe(PO4)3.

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A new langbeinite-type phosphate: K(2)AlSn(PO(4))(3).

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The ?-modification of trizinc borate phosphate, Zn(3)(BO(3))(PO(4)).

Project description:Crystals of ?-Zn(3)(BO(3))(PO(4)) have been grown by the Kyropoulos method. The asymmetric unit contains three Zn sites, three B-atom sites (all with symmetry 3), two P sites (both with m symmetry) and nine O-atom sites (four with m symmetry). The fundamental building units of the title structure are isolated BO(3) triangles and PO(4) tetra-hedra, which are bridged by ZnO(4) tetra-hedra or ZnO(5) trigonal bipyramids through common O atoms, leading to a three-dimensional framework structure. Some significant structural differences between the ?-polymorph and the ?-polymorph are discussed.

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

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Heptamagnesium bis-(phosphate) tetra-kis-(hydrogen phosphate) with strong hydrogen bonds: Mg(7)(PO(4))(2)(HPO(4))(4).

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Sodium samarium tetra-kis-(poly-phosphate), NaSm(PO(3))(4).

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Dipotassium samarium(III) molybdate(VI) phosphate(V), K(2)Sm(MoO(4))(PO(4)).

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