Na3Al(AsO4)2

Fakhar Bourguiba, N.; Zid, M.F.; Driss, A.

doi:10.1107/S1600536813002213

Volume 69
Part 2
Page i14
February 2013

Received 15 January 2013
Accepted 22 January 2013
Online 31 January 2013

Key indicators
Single-crystal X-ray study
T = 298 K
Mean (As-O) = 0.002 Å
R = 0.022
wR = 0.058
Data-to-parameter ratio = 12.5
Details

Na₃Al(AsO₄)₂

Noura Fakhar Bourguiba,^a Mohamed Faouzi Zid ^a ^* and Ahmed Driss ^a

^aLaboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis ElManar, 2092 ElManar II Tunis, Tunisia
Correspondence e-mail: faouzi.zid@fst.rnu.tn

The structure of the title compound trisodium aluminium bis(arsenate), Na₃Al(AsO₄)₂, is built up from AlO₄ and AsO₄ corner-sharing tetrahedra, forming an undulating two-dimensional framework parallel to (100). The layers are constituted of large Al₆As₆O₃₆ rings made up from six AlO₄ and AsO₄ tetrahedra in which two sodium cations are situated, the third sodium cation being located in the interlayer space. The structural relationships between the title compound and Na₃Fe(PO₄)₂, NaAlCo(PO₄)₂ and Al₅Co₃(PO₄)₈ are discussed.

Related literature

For open-framework structures, see: Colomban (1986); Brunet et al. (2003); Alamo & Roy (1984); Delmas et al. (1987). For details of the preparation, see: Driss & Jouini (1994); Masquelier et al. (1995). For closely related structures, see: Belkhiria et al. (1998); Chen et al. (1997); Bennet & Marcus (1988). For bond-valence calculations, see: Brown & Altermatt (1985).

Experimental

Crystal data

Na₃Al(AsO₄)₂
M_r = 373.79
Monoclinic, P 2₁ /c
a = 6.5948 (7) Å
b = 11.8018 (9) Å
c = 9.4692 (8) Å
= 96.52 (1)°
V = 732.23 (12) Å³
Z = 4
Mo K radiation
= 9.44 mm^-1
T = 298 K
0.28 × 0.18 × 0.12 mm

Data collection

Enraf-Nonius CAD-4 diffractometer
Absorption correction: scan (North et al., 1968) T_min = 0.15, T_max = 0.32
2484 measured reflections
1596 independent reflections
1484 reflections with I > 2(I)
R_int = 0.032
2 standard reflections every 120 min intensity decay: 1.2%

Refinement

R[F² > 2(F²)] = 0.022
wR(F²) = 0.058
S = 1.09
1596 reflections
128 parameters
_max = 0.81 e Å^-3
_min = -1.02 e Å^-3

Table 1
Selected bond lengths (Å)

Al1-O2ⁱ	1.771 (2)
Al1-O4	1.755 (2)
Al1-O6ⁱⁱ	1.769 (2)
Al1-O8ⁱⁱⁱ	1.755 (2)
As1-O1	1.654 (2)
As1-O2	1.732 (2)
As1-O5^iv	1.649 (2)
As2-O3	1.655 (2)
As2-O4^v	1.723 (2)
As2-O6	1.734 (2)
As2-O7	1.655 (2)
Symmetry codes: (i) -x+1, -y+1, -z+1; (ii) $[x, -y+{\script{1\over 2}}, z+{\script{1\over 2}}]$ ; (iii) $[-x+1, y-{\script{1\over 2}}, -z+{\script{1\over 2}}]$ ; (iv) x+1, y, z; (v) $[-x+1, y+{\script{1\over 2}}, -z+{\script{1\over 2}}]$ .

Data collection: CAD-4 EXPRESS (Duisenberg, 1992; Macícek & Yordanov, 1992); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1998); software used to prepare material for publication: WinGX publication routines (Farrugia, 2012).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: VN2065 ).

References

Alamo, J. & Roy, R. (1984). J. Am. Ceram. Soc. 67, 78-80.
Belkhiria, M. S., Laaribi, S., Ben Hadj Amara, A. & Ben Amara, M. (1998). Ann. Chim. Sci. Mat. 23, 117-120.
Bennet, J. M. & Marcus, B. K. (1988). Stud. Surf. Sci. Catal. 37, 269-279.
Brandenburg, K. (1998). DIAMOND. University of Bonn, Germany.
Brown, I. D. & Altermatt, D. (1985). Acta Cryst. B41, 244-247.
Brunet, F., Bagdassarov, N. & Miletich, R. (2003). Solid State Ionics, 159, 35-47.
Chen, X.-A., Zhao, L., Li, Y., Guo, F. & Chen, B.-M. (1997). Acta Cryst. C53, 1754-1756.
Colomban, Ph. (1986). Solid State Ionics, 21, 97-115.
Delmas, C., Cherkaoui, F., Nadiri, A. & Hagenmuller, P. (1987). Mater. Res. Bull. 22, 631-639.
Driss, A. & Jouini, T. (1994). J. Solid State Chem. 112, 277-280.
Duisenberg, A. J. M. (1992). J. Appl. Cryst. 25, 92-96.
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.
Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.
Macícek, J. & Yordanov, A. (1992). J. Appl. Cryst. 25, 73-80.
Masquelier, C., D'Yvoire, F. & Collin, G. (1995). J. Solid State Chem. 118, 33-42.
North, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351-359.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.

inorganic compounds