The crystal chemistry of four thorium sulfates

✍ Scribed by Amanda J. Albrecht; Ginger E. Sigmon; Laura Moore-Shay; Rebecca Wei; Colleen Dawes; Jennifer Szymanowski; Peter C. Burns

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 1023 KB
• Volume: 184
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2011.04.024

✦ Synopsis

Four thorium sulfate compounds have been synthesized and characterized. [Th(SO 4 ) 2 (H 2 O) 7 ] Á 2H 2 O (ThS1) crystallizes in space group P2 1 /m, a ¼ 7.2488(4), b ¼ 12.1798(7), c ¼ 8.0625(5) Å, b¼98.245(1) o ; 9), b ¼11.1669(5), c¼ 14.4705(7) Å. In all cases the Th cations are coordinated by nine O atoms corresponding to SO 4 tetrahedra, OH groups, and H 2 O groups. The structural unit of ThS1 is an isolated cluster consisting of a single Th polyhedron with two monodentate SO 4 tetrahedra and seven H 2 O groups. A double-wide Th sulfate chain is the basis of ThS2. The structures of ThS3 and ThS4 are frameworks of Th polyhedra and sulfate tetrahedra, and each contains channels that extend through the framework. One of the Th cations in ThS3 is coordinated by a bidentate SO 4 tetrahedron, and ThS4 is unusual in the presence of a pair of Th cations that share a polyhedral face.