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Figure 1 Thermal ellipsoid plot of a portion of the polymeric structure of [(C4H5NO4)2(C4H6NO4)LaNi.H2O]n; displacement ellipsoids are drawn at the 70% probability level, and hydrogen atoms as spheres of arbitrary radius. The water molecule is not shown. Symmetry codes: (i)1 − x, 1 − y, 2 − z; (ii) x, 1 − y, z − ; (iii) 1 - x y, − z; (iv) 1 − x, 1 − y, 1 − z; (v) x, 1 − y, + z. |