Reversible potassium ion insertion into Na3V2O2x(PO4)2F3-2x, which is regarded as a solid solution between Na3V3+2(PO4)2F3 and Na3V4+2O2(PO4)2F demonstrated for the first time. V3+/V4+-mixed Na3V2O2x (PO4)2F3-2x-multiwalled carbon nanotube (MWCNT) composite was prepared by conventional hydrothermal reaction. Na3V2O2x(PO4)2F3-2x-MWCNT exhibiting an average electrode potential of 3.7 V in cell du...

The title compound, barium trimanganese tris-(ortho-phosphate), was synthesized hydro-thermally. Its structure is isotypic with the lead and strontium analogues AMn(II) 2Mn(III)(PO4)3 (A = Pb, Sr). Except for two O atoms on general positions, all atoms are located on special positions. The Ba and one P atom exhibit mm2 symmetry, the Mn(II) atom 2/m symmetry, the Mn(III) atom and the other P ato...

During an attempt to crystallize potassium manganese diiron phosphate KMnFe(2)(PO(4))(3) by the flux method, a new phase, potassium dimanganese iron triphosphate, K(0.53)Mn(2.37)Fe(1.24)(PO(4))(3), was isolated. This phase, whose composition was confirmed by ICP analysis, is isotypic with the alluaudite-like phosphates, thus it exhibits the (A2)(A'2)(A1)(A'1)(A''1)(M1)(M2)(2)(PO(4))(3) general ...