BaMn^II₂Mn^III(PO₄)₃

Abstract

The title compound, barium trimanganese tris­(ortho­phosphate), was synthesized hydro­thermally. Its structure is isotypic with the lead and strontium analogues AMnII 2MnIII(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 MnII atom 2/m symmetry, the MnIII atom and the other P atom .2. symmetry and two O atoms are located on mirror planes. The crystal structure contains two types of chains running parallel to [010]. One chain is linear and is composed of alternating MnIIIO6 octa­hedra and PO4 tetra­hedra sharing vertices; the other chain has a zigzag arrangement and is built up from two edge-sharing MnIIO6 octa­hedra connected to PO4 tetra­hedra by edges and vertices. The two types of chains are linked through PO4 tetra­hedra into an open three-dimensional framework which contains channels parallel to [100] and [010] in which the BaII ions are located. The alkaline earth cation is surrounded by eight O atoms in the form of a slightly distorted bicapped trigonal prism.

Crystal structure of strontium dicobalt iron(III) tris(orthophosphate): SrCo2Fe(PO4)3

“…Those studies involved the synthesis and structural characterization of new phosphates such as Na 2 Co 2 Fe(PO 4 ) 3 (Bouraima et al, 2015) and Na 1.67 Zn 1.67 Fe 1.33 (PO 4 ) 3 (Khmiyas et al, 2015) belonging to the alluaudite-type structure group. In addition, divalent and trivalent transition-metal-based phosphates, such as SrNi 2 Fe(PO 4 ) 3 (Ouaatta et al, 2015) and MMn II 2 Mn III (PO 4 ) 3 (M = Pb, Sr, Ba) (Alhakmi et al, 2013a,b;Assani et al, 2013) have been shown to adopt the -CrPO 4 structure type.…”

K1+2xNi1−xFe2(AsO4)3(x= 0,125): un nouvel arséniate à structure de type α-CrPO4

“…Notes: DNP = diffraction des neutrons sur poudre; DRXM = diffraction des rayons X sur moncristal; DRXP = diffraction des rayons X sur poudre; & = site vacant. Ré férences: (a) Glaum et al les deux exclusivement par des cations trivalents (Rittner & Glaum, 1994;Attfield et al, 1989), par une distribution statistique de cations di-et trivalents (Yahia et al, 2016;Souiwa et al, 2015b;Essehli et al, 2015), l'un par une ré partition statistique de cations di-et trivalents et l'autre uniquement par des cations di-ou trivalents (Souiwa et al, 2015a; Ben Smail & Zid, 2017b) ou l'un par des cations divalents et l'autre par des cations trivalents (Bouraima et al, 2016;Ouaatta et al, 2015;Alhakmi et al, 2013a,b;Assani et al, 2013;Korzenski et al, 1999;Hidouri et al, 2004;Kinomura et al, 1989). La derniè re ré partition cationique est observé e dans l'arsé niate objet de ce travail.…”

Synthesis and crystal structure of calcium dizinc iron(III) tris(orthophosphate), CaZn2Fe(PO4)3

“…In our previous hydrothermal investigations, a variety of compounds have been synthesized and characterized with different ratios of alkaline earth metal:P, viz. Sr 2 Mn 3 (HPO 4 ) 2 (PO 4 ) 2 (Khmiyas et al, 2013), BaMn II 2 Mn III (PO 4 ) 3 (Assani et al, 2013), Mg 7 (PO 4 ) 2 (HPO 4 ) 4 (Assani et al, 2011). In this context, our interest is focused on the synthesis of new iron orthophosphates with an open-framework structure.…”