Inorganic Chemistry, Vol.42, No.22, 6989-6995, 2003
Exploration of composition space in templated uranium sulfates
The phase stability of organically templated uranium sulfates in the [UO2(CH3CO2)(2).2H(2)O/homopiperazine/H2SO4] and [UO2(CH3CO2)(2).2H(2)O/N,N-dimethylethylenediamine/H2SO4] systems has been studied using composition space. Two new compounds were formed in each system; [N2C5H14](2)[UO2(SO4)(3)] (USO-17) and [N2C5H14][UO2(H2O)(SO4)(2)] (USO-18) contain homopiperazine, and [N2C4H14][UO2(SO4)(2)] (USO-19) and [N2C4H14][(UO2)2(H2O)(SO4)(3)].H2O (USO-20) contain N,N-dimethylethylenediamine. The relative stability of the products from each system is dependent upon the reactant mole fractions in the initial reaction gel. Crystal data: USO-17, a = 14.4975(3) Angstrom, b = 11.9109(3) Angstrom, c = 13,0157(3) Angstrom, beta = 110.475(1)degrees, monoclinic, C2/c (No. 15), Z= 4; for USO-18, a = 7.6955(2) Angstrom, b = 11.7717(3) Angstrom, c = 14.7038(4) Angstrom, orthorhombic, P22(1)2(1) (No. 18), Z = 4; for USO-19, a = 9.3322(1) Angstrom, b = 9.7743(2) Angstrom, c = 13.8897(3) Angstrom, orthorhombic, P2(1)2(1)2(1) (No. 19), Z = 4; and for USO-20, a = 11.2460(2) Angstrom, b = 10.5387(2) Angstrom, c = 17.0432(3) Angstrom, beta = 92.9884(6)degrees, monoclinic, P2(1)/c (No. 14), Z = 4.