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Volume 69 
Part 7 
Page i40  
July 2013  

Received 4 June 2013
Accepted 13 June 2013
Online 22 June 2013

Key indicators
Single-crystal X-ray study
T = 296 K
Mean [sigma](Pb-O) = 0.003 Å
R = 0.016
wR = 0.040
Data-to-parameter ratio = 14.8
Details
Open access

A new mixed-valence lead(II) manganese(II/III) phosphate(V): PbMnII2MnIII(PO4)3

aLaboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Battouta, BP 1014, Rabat, Morocco
Correspondence e-mail: g_alhakmi@yahoo.fr

The title compound, lead trimanganese tris(orthophosphate), has been synthesized by hydrothermal methods. In this structure, only two O atoms are in general positions and all others atoms are in the special positions of the Imma space group. Indeed, the atoms in the Wyckoff positions are namely: Pb1 and P1 on 4e (mm2); Mn1 on 4b (2/m); Mn2 and P2 on 8g (2); O1 on 8h (m); O2 on 8i (m). The crystal structure can be viewed as a three-dimensional network of corner- and edge-sharing PO4 tetrahedra and MnO6 octahedra, building two types of chains running along the b axis. The first is an infinite linear chain, formed by alternating MnIIIO6 octahedra and PO4 tetrahedra which share one vertex. The second chain is built up from two adjacent edge-sharing octahedra (MnII2O10 dimers) whose ends are linked to two PO4 tetrahedra by a common edge. These chains are linked together by common vertices of polyhedra in such a way as to form porous layers parallel to (001). These sheets are bonded by the first linear chains, leading to the appearance of two types of tunnels, one propagating along the a axis and the other along b. The PbII ions are located within the intersections of the tunnels with eight neighbouring O atoms in form of a trigonal prism that is capped by two O atoms on one side. The three-dimensional framework of this structure is compared with similar phosphates such as Ag2Co3(HPO4)(PO4)2 and Ag2Ni3(HPO4)(PO4)2.

Related literature

For compounds with related structures see: Assani et al. (2011a[Assani, A., El Ammari, L., Zriouil, M. & Saadi, M. (2011a). Acta Cryst. E67, i41.],b[Assani, A., El Ammari, L., Zriouil, M. & Saadi, M. (2011b). Acta Cryst. E67, i40.],c[Assani, A., Saadi, M., Zriouil, M. & El Ammari, L. (2011c). Acta Cryst. E67, i5.]); Moore & Ito (1979[Moore, P. B. & Ito, J. (1979). Mineral. Mag. 43, 227-35.]). For applications of related compounds, see: Trad et al. (2010[Trad, K., Carlier, D., Croguennec, L., Wattiaux, A., Ben Amara, M. & Delmas, C. (2010). Chem. Mater. 22, 5554-5562.]). For compounds with mixed-valence manganese(II/III) lead(II) triphosphates(V), see: Adam et al. (2009[Adam, L., Guesdon, A. & Raveau, B. (2009). J. Solid State Chem. 182, 2338-2343.]). For bond-valence analysis, see: Brown & Altermatt (1985[Brown, I. D. & Altermatt, D. (1985). Acta Cryst. B41, 244-247.]).

Experimental

Crystal data
  • PbMn3(PO4)3

  • Mr = 656.92

  • Orthorhombic, I m m a

  • a = 10.2327 (8) Å

  • b = 13.9389 (9) Å

  • c = 6.6567 (4) Å

  • V = 949.46 (11) Å3

  • Z = 4

  • Mo K[alpha] radiation

  • [mu] = 22.15 mm-1

  • T = 296 K

  • 0.36 × 0.23 × 0.10 mm

Data collection
  • Bruker X8 APEX diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2009[Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.046, Tmax = 0.215

  • 4704 measured reflections

  • 787 independent reflections

  • 771 reflections with I > 2[sigma](I)

  • Rint = 0.028

Refinement
  • R[F2 > 2[sigma](F2)] = 0.016

  • wR(F2) = 0.040

  • S = 1.11

  • 787 reflections

  • 53 parameters

  • [Delta][rho]max = 2.54 e Å-3

  • [Delta][rho]min = -0.98 e Å-3

Data collection: APEX2 (Bruker, 2009[Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2009[Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012[Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.]) and DIAMOND (Brandenburg, 2006[Brandenburg, K. (2006). DIAMOND. Crystal Impact GbR, Bonn, Germany.]); software used to prepare material for publication: publCIF (Westrip, 2010[Westrip, S. P. (2010). J. Appl. Cryst. 43, 920-925.]).


Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BR2227 ).


Acknowledgements

The authors thank the Unit of Support for Technical and Scientific Research (UATRS, CNRST) for the X-ray measurements.

References

Adam, L., Guesdon, A. & Raveau, B. (2009). J. Solid State Chem. 182, 2338-2343.  [Web of Science] [CrossRef] [ChemPort]
Assani, A., El Ammari, L., Zriouil, M. & Saadi, M. (2011a). Acta Cryst. E67, i41.  [CrossRef] [IUCr Journals]
Assani, A., El Ammari, L., Zriouil, M. & Saadi, M. (2011b). Acta Cryst. E67, i40.  [CrossRef] [IUCr Journals]
Assani, A., Saadi, M., Zriouil, M. & El Ammari, L. (2011c). Acta Cryst. E67, i5.  [CrossRef] [IUCr Journals]
Brandenburg, K. (2006). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Brown, I. D. & Altermatt, D. (1985). Acta Cryst. B41, 244-247.  [CrossRef] [Web of Science] [IUCr Journals]
Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.  [Web of Science] [CrossRef] [ChemPort] [IUCr Journals]
Moore, P. B. & Ito, J. (1979). Mineral. Mag. 43, 227-35.  [CrossRef] [ChemPort]
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [ChemPort] [IUCr Journals]
Trad, K., Carlier, D., Croguennec, L., Wattiaux, A., Ben Amara, M. & Delmas, C. (2010). Chem. Mater. 22, 5554-5562.  [Web of Science] [CrossRef] [ChemPort]
Westrip, S. P. (2010). J. Appl. Cryst. 43, 920-925.  [Web of Science] [CrossRef] [ChemPort] [IUCr Journals]


Acta Cryst (2013). E69, i40  [ doi:10.1107/S1600536813016504 ]

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