Abstract
A powdered sample of deuterated uranyl selenate dihydrate UO2SeO4 · 2D2O is studied by neutron diffraction. This compound crystallizes in monoclinic space group P21/c; a = 6.974(1) A, b= 8.289(2) A, c = 11.664(2) A, β=92.319(6)°, Z = 4, Rf = 3.14, RI = 5.53, gC2 = 2.82. The main structural units of the compound are [UO2SeO4(D2O)2] chains propagating along [100]. These chains are linked into a framework group (A = UO22+, T3 = SeO42−, and M1 = D2O) of uranyl complexes. These chains are linked into a framework by a system of hydrogen bonds formed by water hydrogen atoms of one chain and uranyl oxygen atoms of another.
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