1. An Acid Terbium(III) Cerium(IV) Sulfate Hydrate, H9Tb7Ce6(SO4)27.72.2H2O
- Author
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J.C. Barnes
- Subjects
Lanthanide contraction ,Chemistry ,chemistry.chemical_element ,Terbium ,General Medicine ,Crystal structure ,Inorganic acids ,General Biochemistry, Genetics and Molecular Biology ,Crystallography ,chemistry.chemical_compound ,Cerium(IV) sulfate ,Phase (matter) ,Hexagonal crystals ,Hydrate - Abstract
Hexagonal crystals of H 9 Ln 7 Ce 6 (SO 4 ) 27 .72H 2 O are known for Ln = La-Tb. The Tb compound is isomorphous with the Nd compound described previously. Tb-O (2.55 A average) is unusually long compared with a typical literature value of 2.43 A and, in spite of the lanthanide contraction, is longer than the corresponding Nd-D distance although the Ce-O distances are identical. Since the quality of the crystals and hence the data is not as good for the Tb compound, and since this phase has not been reported for Ln = Dy-Lu, it may be that the size of the Ln III site is fixed by the Ce IV -SO 4 2- network.
- Published
- 1995
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