Netunium(IV) Complex with Carbamide [Np(Urea)_8]SiW_12O_40 centre dot 2Urea centre dot H_2O: Synthesis, Crystal Structure, and Properties

摘要

The synthesis and crystla structure of [Np(Urea)_8]SiW_12O_40 centre dot 2Urea centre dot H_2O complex are reported. Crystallographic parameters: space groups C2/c, a=18.972(5) A, b=18.891(5) A, c=16.654(4) A, beta=100.847(6) deg, Z=4, V=5862(3) A~3, p(calcd)=4.226 g/cm~3. Thermal properties of this compound are studied; absorption spectra in the IR and visible regions are mesured.