Rare earth silicates and germanates crystallizing in the wadeite and related structure types

Cs3REIIIGe3O9 (RE = Pr, Nd, and Sm–Yb) and Cs8TbIII2TbIVGe9O27: A Rare Example of a Mixed-Valent Tb(III)/Tb(IV) Oxide

“…10−12 However, in some instances, new structure types and even compositions exist for the germanates that are not known for the silicates. 13 The 12 cesium rare earth germanates reported in this work crystallize in two new structure types with no analogous silicate compositions.…”

“…29 We have been exploring the rare earth germanate phase space via flux growth. 12,13,30,31 In particular, we have found mixed alkali halide fluxes to be particularly well suited for the synthesis of alkali rare earth germanates. 12,13 Recently, we reported on the synthesis and structures of Ce(IV) germanates crystallizing in the Wadeite structure type 32 and two Dy(III) germanates that crystallize in related structures.…”

“…12,13,30,31 In particular, we have found mixed alkali halide fluxes to be particularly well suited for the synthesis of alkali rare earth germanates. 12,13 Recently, we reported on the synthesis and structures of Ce(IV) germanates crystallizing in the Wadeite structure type 32 and two Dy(III) germanates that crystallize in related structures. 13 In our continued exploration of this phase space, we discovered Cs The mixtures were placed in either a 14 mL high-form silver crucible or a cylindrical silver crucible that is 1.2 cm in diameter and 5.6 cm in height.…”

“…12,13 Recently, we reported on the synthesis and structures of Ce(IV) germanates crystallizing in the Wadeite structure type 32 and two Dy(III) germanates that crystallize in related structures. 13 In our continued exploration of this phase space, we discovered Cs The mixtures were placed in either a 14 mL high-form silver crucible or a cylindrical silver crucible that is 1.2 cm in diameter and 5.6 cm in height. No differences in reaction products were observed on the basis of the reaction vessel.…”

“…Rare earth silicates make up an extensively studied class of materials that have attracted attention due to their potential applications, primarily as optical and luminescent materials. − The rare earth germanates, while offering the same potential applications, are considerably less studied. In many cases, the germanates adopt the same structures as the corresponding silicates. − However, in some instances, new structure types and even compositions exist for the germanates that are not known for the silicates . The 12 cesium rare earth germanates reported in this work crystallize in two new structure types with no analogous silicate compositions.…”