Hydrothermal Synthesis, Crystal Structure and Properties of 2-D and 3-D Lanthanide Sulfates.

Abstract Two new lanthanum sulfates DySO4(OH) 1 and Eu2(SO4)3(H2O)8 2 have been hydrothermally synthesized. The colorless crystals were characterized by IR, TGA, ICP and XRD. The structure was determined by single-crystal X-ray diffraction. 1 crystallizes with monoclinic symmetry, space group P2(1)/n [a=7.995(4) A, b=10.945(5) A, c=8.164(4) A, α=90°, β=93.619(6)°, γ=90°, V=713.0(5) A3, Z=8]. It displays a three-dimensional framework, based on the novel Dy–O chains connected by the sulfate groups through helical chains. 2 crystallizes with monoclinic symmetry, space group C2/c, [a=13.5605(17) A, b=6.7676(8) A, c=18.318(2) A, α=90°, β=102.265(2)°, γ=90°, V=1642.7 (4) A3, Z=4]. Its layered framework is attained by the europium atoms connected by the sulfate groups arranged in a helical manner.