An arsenate with the α-CrPO4 structure type, NaCa1–xNi3–2xAl2x(AsO4)3 (x = 0.23): crystal structure, charge-distribution and bond-valence-sum analyses

Ben Smail, R.; Zid, M.F.

doi:10.1107/S2053229617013213

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 2
A plot of the asymmetric unit of NaCa_0.77Ni_2.54Al_0.46(AsO₄)₃, showing the atom labelling. The full coordination polyhedra are shown by including the corresponding symmetry-related O atoms. Displacement ellipsoids are plotted at the 80% probability level. [Symmetry codes: (xiv) $[-x+{\script{3\over 2}}, -y+{\script{1\over 2}}, -z+{\script{3\over 2}}]$ ; (xv) $[x-{\script{1\over 2}}, y-{\script{1\over 2}}, z-{\script{1\over 2}}]$ ; (xvi) $[-x+{\script{3\over 2}}, y-{\script{1\over 2}}, z-{\script{1\over 2}}]$ ; (xvii) $[x-{\script{1\over 2}}, -y+{\script{1\over 2}}, -z+{\script{3\over 2}}]$ ; (xviii) -x+1, -y, -z+1; (xix) $[-x+{\script{3\over 2}}, y]$ , $[-z+{\script{3\over 2}}]$ ; (xx) x, -y+1, -z+2; (xxi) $[-x+{\script{3\over 2}}]$ , $[-y+1, z-{\script{1\over 2}}]$ ; (xxii) $[-x+1, -y+{\script{1\over 2}}, z]$ .]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 73| Part 11| November 2017| Pages 896-904

https://doi.org/10.1107/S2053229617013213

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