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Figure 1 Part of Na7Al3 (As2O7) 4 structure. The ellipsoids were defined with 50% probability. [Symmetry code: (i): − x, y, − z + 0.5; (ii): x − [{1\over 2}], y − [{1\over 2}], z; (iii): − x + [{1\over 2}], y − [{1\over 2}], − z + 0.5; (iv): − x + 1, − y, − z + 1; (v): −x + [{1\over 2}], − y + [{1\over 2}], − z + 1].

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 69| Part 8| July 2013| Page i53
doi:10.1107/S1600536813020151
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