| Institution: | 1. Department of Chemistry, Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia;2. Kurnakov Institute of General and Inorganic Chemistry, Russian Acad. Sci., Leninskii pr. 31, 119991 Moscow, Russia;3. Department of Crystallography, Institute of Earth Sciences, Sr. Petersburg State University, University Emb. 7/9, 199034 St. Petersburg, Russia
Kola Science Center, Russian Acad. Sci., 184200 Apatity, Murmansk Region, Russia;4. Department of Crystallography, Institute of Earth Sciences, Sr. Petersburg State University, University Emb. 7/9, 199034 St. Petersburg, Russia |
| Abstract: | Crystals of a new uranyl sulfate (C2N4H8S2)UO2(SO4)2] · 0.3H2O ( 1 ) templated by a relatively rare bis-isothiouronium cation, were formed upon evaporation of aqueous solutions containing uranyl acetate, thiourea, and excess sulfuric acid. The new compound is orthorhombic, P212121, a = 6.928(2) Å, b = 13.398(3) Å, c = 15.225(3) Å, Z = 2. Its crystal structure is comprised of UO2(SO4)2] moieties linked by hydrogen bonds formed between the template cations and terminal oxygen atoms of the sulfate tetrahedra. The C2N4H8S22+ template is most likely formed in situ during a redox reaction between uranyl cation and thiourea in a strongly acidic medium, with UO22+ partially reduced to U4+. |
