Crystal structure and nonlinear optical properties of the K2UO2(SO4)2 · 2H2O compound at 293 K

Abstract

Single crystals of potassium uranyl sulfate are grown, and their atomic structure is determined using X-ray diffraction analysis. The compound crystallizes in the orthorhombic crystal system with space group Pna2{sub 1} [a = 13.773(4) A, b = 7.288(2) A, c = 11.556(4) A, R{sub 1} = 0.033, wR{sub 2} = 0.0892 for 2630 reflections with I > 2{sigma}(I)]. The crystal structure of the K{sub 2}UO{sub 2}(SO{sub 4}){sub 2} . 2H{sub 2}O compound is built up of two-dimensional infinite, negatively charged layers of the composition [UO{sub 2}(SO{sub 4}){sub 2}.H{sub 2}O]{sub 2{infinity}}{sup {delta}}{sup -}], which are linked together through the K{sup +} ions. The specific features of the atomic arrangement in the structure of this compound are analyzed, and the second harmonic generation of laser radiation is investigated.