LiDy(PO3)4

Chehimi-Moumen, F.; Férid, M.

doi:10.1107/S1600536808016875

Volume 64
Part 7
Page i45
July 2008

Received 30 May 2008
Accepted 3 June 2008
Online 13 June 2008

Key indicators
Single-crystal X-ray study
T = 295 K
Mean (P-O) = 0.006 Å
R = 0.039
wR = 0.088
Data-to-parameter ratio = 12.3
Details

LiDy(PO₃)₄

Fathia Chehimi-Moumen ^a and Mokhtar Férid ^b ^*

^aLaboratoire d'Application de la Chimie aux Ressources et Substances Naturelles et à l'Environnement, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisia, and ^bUnité des Matériaux de Terres Rares, Centre National de Recherches en Sciences des Matériaux, BP 95, 2050 Hammam-Lif, Tunisia
Correspondence e-mail: mokhtar.ferid@inrst.rnrt.tn

Single crystals of lithium dysprosium polyphosphate, LiDy(PO₃)₄, were prepared by the flux method. The atomic arrangement is built up by infinite (PO₃)_n chains extending along the b axis. Dy³⁺ and Li⁺ cations alternate in the middle of four such chains, with DyLi distances of 3.54 (1) and 3.48 (1) Å. The DyO₈ dodecahedra and LiO₄ tetrahedra deviate significantly from the ideal geometry. Both Dy and Li occupy special positions (Wyckoff position 4e, site symmetry 2).

Related literature

For related literature, see: Averbuch-Pouchot & Bagieu Beucher (1987); Ben Zarkouna et al. (2005; 2007); Ben Zarkouna & Driss (2004); Durif (1995); Ettis et al. (2006); Férid (2006); Hashimoto et al. (1991); Hong (1975); Horchani et al. (2003); Liu & Li (1983); Chehimi-Moumen & Férid (2007); Koizumi (1976); Yamada et al. (1974).

Experimental

Crystal data

LiDy(PO₃)₄
M_r = 485.32
Monoclinic, C 2/c
a = 16.269 (1) Å
b = 7.0236 (3) Å
c = 9.5781 (8) Å
= 126.106 (3)°
V = 884.24 (10) Å³
Z = 4
Mo K radiation
= 9.24 mm^-1
T = 295 (2) K
0.10 × 0.09 × 0.08 mm

Data collection

Nonius KappaCCD diffractometer
Absorption correction: analytical (de Meulenaer & Tompa, 1965) T_min = 0.42, T_max = 0.45
3313 measured reflections
1021 independent reflections
858 reflections with I > 2(I)
R_int = 0.080

Refinement

R[F² > 2(F²)] = 0.038
wR(F²) = 0.087
S = 0.95
1021 reflections
83 parameters
_max = 2.26 e Å^-3
_min = -2.13 e Å^-3

Data collection: COLLECT (Nonius, 1998); cell refinement: DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXL97.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FI2064 ).

Acknowledgements

This work was supported by the Ministry of Higher Education, Scientific Research and Technology of Tunisia.

References

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inorganic compounds