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Three uranyl sulfates, (C 6 H 20 N 4 )[(UO 2 ) 2 (SO 4 ) 4  · (H 2 O) 2 ](H 2 O) 6  (TETAUS), (C 15 H 14 N 3 )[(UO 2 )(SO 4 ) 2 ](NO 3 ) · (H 2 O) 2  (TPUS), and K 2 [(UO 2 )(SO 4 ) 2 (H 2 O)] · H 2 O (KUS), and two uranyl selenates, K(H 3 O)[(UO 2 ) 2 (SeO 4 ) 3  · (H 2 O)](H 2 O) 6  (KUSe) and (H 3 O) 2 [(UO 2 ) 2 (SeO 4 ) 3  · (H 2 O)] (USe), were synthesized by slow evaporation of aqueous solutions at room temperature. TETAUS crystallizes in space group  P -1,  a  = 6.7186(5) Å,  b  = 9.2625(7) Å,  c  = 13.1078(9) Å,  α  = 72.337(2)°,  β  = 89.198(2)°,  γ  = 70.037(1)°,  V  = 726.89(9) Å 3 ,  Z  = 1. TPUS is triclinic,  P -1,  a  = 6.9732(7) Å,  b  = 13.569(1) Å,  c  = 13.641(1) Å,  α  = 111.809(2)°,  β  = 102.386(2)°,  γ  = 93.833(2)°,  V  = 1150.0(2) Å 3 ,  Z  = 2. KUS is orthorhombic,  Cmca ,  a  = 12.171(2) Å,  b  = 16.689(3) Å,  c  = 10.997(2) Å,  V  = 2233.8(6) Å 3 ,  Z  = 8. These uranyl sulfates are built from infinite one-dimensional uranyl sulfate chains with different topologies. KUSe is monoclinic,  P 2 1 /n,  a  = 14.715(1) Å,  b  = 10.1557(7) Å,  c  = 15.833(1) Å,  β  = 114.415(1)°,  V  = 2154.5(3) Å 3 ,  Z  = 4. Its structure is based on a two-dimensional uranyl selenate sheet. USe crystallizes in space group  P 2 1 /c,  a  = 10.6124(2) Å,  b  = 14.7717(3) Å,  c  = 13.7139(3) Å,  β  = 96.989(1)°,  V  = 2133.86(8) Å 3 ,  Z  = 4, with a complex three-dimensional uranyl selenate framework containing channels extending in three directions.

Syntheses, structures, and IR spectroscopic characterization of new uranyl sulfate/selenate 1D-chain, 2D-sheet and 3D-framework