(C₈H₂₆N₄)_0.5[(UO₂)₂(SO₄)₃(H₂O)]·2H₂O, an organically templated uranyl sulfate with a novel layer type

Abstract

Key indicatorsSingle-crystal X-ray study T = 150 K Mean '(C±C) = 0.010 A Ê R factor = 0.025 wR factor = 0.055 Data-to-parameter ratio = 13.0For details of how these key indicators were automatically derived from the article, see

Formation of co-racemic uranyl chromate constructed from chiral layers of different topology

“…The structural topologies of layers in (1), (2), (3) and (4) are similar to those previously reported for uranyl selenates, uranyl sulfates and uranyl chromates (Thomas et al, 2003;Doran et al, 2003Doran et al, , 2004Krivovichev et al, 2009;Siidra et al, 2012a). The structure of (2) is the first example of [(UO 2 ) 2 (T 6+ O 4 ) 3 (H 2 O)] 2À (T = S 6+ , Cr 6+ , Se 6+ ) layer forma-tion in uranyl-based compounds with inorganic cations only.…”

“…Below the graphs the achiral orientation matrix is given. topology of the layer in (1) is identical to previously reported ones (Thomas et al, 2003;Doran et al, 2003Doran et al, , 2004Krivovichev et al, 2009;Siidra et al, 2012a). This type of topology ( Fig.…”

“…Layers having the common composition [(UO 2 ) 2 (T 6+ O 4 ) 3 (H 2 O)] 2À (T = S 6+ , Cr 6+ , Se 6+ ) were previously described for a number of hydrous uranyl sulfates (Thomas et al, 2003;Doran et al, 2003Doran et al, , 2004Bharara & Gorden, 2010), uranyl chromates (Siidra et al, 2012a) and uranyl selenates (Ling et al, 2009;Krivovichev et al, 2009), all of which in addition contain organic cations. Their layers were classified by Krivovichev et al (2007) into three different topologies with unique black-and-white graphs.…”

Influence of the Organic Species and Oxoanion in the Synthesis of two Uranyl Sulfate Hydrates, (H3O)2[(UO2)2(SO4)3­(H2O)]·7H2O and (H3O)2[(UO2)2(SO4)3(H2O)]·4H2O, and a Uranyl Selenate‐Selenite [C5H6N][(UO2)(SeO4)(HSeO3)]

“…A higher S/U ratio leads to a negatively charged [(UO 2 ) 2 (SO 4 ) 3 (H 2 O)] 2– layer, whereas the [(UO 2 )(SO 4 )] chains have a neutral charge. Polymerization of such a dimensionality was only previously reported with templating agents that remain in the final structures as charge balancing agents 21,23–30. In the absence of templating agents, the hydrogen bond network resulting from the H x O groups in the interlayers of these compounds supply the additional coordination of the structural units and provide the bond valence requirements to link the chains or layers of the structures 77.…”

Hydrothermal Synthesis, Structure and Thermal Stability of Diamine Templated Layered Uranyl‐Vanadates.

“…One approach for designing novel layered and microporous uranium-bearing materials is to exert influence over structural features through the introduction of templating agents. Amines have historically been used as charge balancing, space filling and templating agents in various systems including molybdate [9][10][11][12][13], phosphate [14][15][16][17][18], phosphite [19], selenate [20], selenite [21], arsenate [17] sulfate [22][23][24][25][26][27][28][29][30][31] and fluoride containing compounds [18,[31][32][33][34][35][36][37][38][39] but organically templated uranyl-vanadates systems remained unexplored so far.…”