ChemInform Abstract: SrMn^II₂Mn^III(PO₄)₃.

Abstract

Mn III (PO 4 ) 3 . -The title compound is prepared hydrothermally from Sr, Mn, and precursors in a molar ratio of 1:3:3 (autoclave, 458 K, 5 d). The structure of SrMn3(PO4)3 (orthorhombic, space group Imma, Z = 4; single crystal XRD) is isotypic to PbMn3(PO4)3 with two O atoms in general positions and all other atoms in special positions. The three-dimensional network contains two types of chains, one of them linear and composed of alternating Mn III O 6 octahedra and PO 4 tetrahedra sharing vertices, and the other with a zigzag arrangement built up from two edge-sharing Mn II O6 octahedra connected to PO4 tetrahedra by edges and vertices. -(ALHAKMI*, G.; ASSANI, A.; SAADI, M.; FOLLET, C.; EL AMMARI, L.; Acta Crystallogr., Sect. E: Struct. Rep. Online 69 (2013) 9, i56, http://dx.doi.org/10.1107/S1600536813020977 ; Lab. Chim. Solide Appl., Fac. Sci., Univ. Mohammed V, Rabat, Morocco; Eng.) -J. Schramke 45-004 SrMn II 2 PO 3-4

Crystal structure of silver strontium copper orthophosphate, AgSr4Cu4.5(PO4)6

“…Na 4 CaFe 4 (PO 4 ) 6 which adopts the ISSN 2056-9890 Alluaudite structure in the ideal C2/c space group (Hidouri et al, 2004), Ba 3 V4(PO 4 ) 6 which crystallizes as a Langbeinitetype structure (Dross & Glaum, 2004), CuTi 4 (PO 4 ) 6 which belongs to the Nasicon family (Kasuga et al, 1999), the silver lead apatite Pb 8 Ag 2 (PO 4 ) 6 (Ternane et al, 2000), the mixedvalent iron(II/III) phosphate Fe 7 (PO 4 ) 6 (Belik et al, 2000) and Na 2.5 Y 0.5 Mg 7 (PO 4 ) 6 with a Fillowite-type structure (Jerbi et al, 2010). Through hydrothermal processes, and as part of our systematic studies of the crystal alkaline and alkaline earth monophosphates, we have previously succeeded in elaborating a number of compounds with three-dimensional networks featuring distinctive cavities including AgMg 3 (H-PO 4 ) 2 PO 4 (Assani et al, 2011), Sr 2 Mn 3 (HPO 4 ) 2 (PO 4 ) 2 (Khmiyas et al, 2013), SrMn 2 II Mn III (PO 4 ) 3 (Alhakmi et al, 2013), NaMg 3 (HPO 4 ) 2 PO 4 (Ould Saleck et al, 2015). In an extension of our investigations and structural studies of various mono-divalent transition-metal phosphates a new phosphate copper (Cu II )-based AgSr 4 Cu 4.5 (PO 4 ) 6 was prepared and successfully characterized.…”