Inorganic Chemistry, Vol.56, No.11, 6044-6047, 2017
One-Pot Hydrothermal Synthesis of Tb-13(III)(GeO4)(6)O-7(OH) and (K2TbGe2O7)-Ge-IV: Preparation of a Stable Terbium(4+) Complex
Two terbium germanates have been synthesized via high-temperature and high-pressure hydro thermal synthesis with 20 M KOH as a mineralizer using Tb4O7 as a starting material. Tb-13(GeO4)(6)O-7(OH) crystallizes in trigonal space group R (3) over bar is built up of isolated GeO4 units, and contains a complex arrangement of terbium oxide polyhedra. K2TbGe2O7 is a terbium(4(+)) pyrogermanate that is isostructural with K2ZrGe2O7 and displays a rare stable Tb4+ oxidation state in the solid state.