Crystal structure of dodecalanthanum heptadecaiodide triethanide, La12I17(C2)3

C 6 Ii7Lai2, monoclinic, C12/cl (no.15), a = 19.927(1)A, b= 12.636(1)A,c = 19.399(1)A,0 = 90.24(1)°,V=4884.6 Ä 3 , Ζ = 4, RgJF) = 0.026, wRreffF 2 ) = 0.062, T= 293 K. Source of materialSingle crystals of Lai2ln(C2)3 are extracted from a mixture of Lab, La and C (molar ratio 7:8:3) heated under Ar atmosphere in sealed Ta capsules at 900 °C for 6 days.Lai2li7(C2)3 forms black polyhedra sensitive to moisture.

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