A new form of Cd₃TeO₆ revealing dimorphism.

ABSTRACT: Phase-formation studies in the system CdO-TeO₃ using a CsCl/NaCl melt at comparatively low temperatures revealed that tricadmium orthotellurate(VI), Cd₃TeO₆, is dimorphic. The new modification of Cd₃TeO₆ is denoted as the β-form and adopts the rhombohedral Mg₃TeO₆ structure type with one Cd and two O sites in general positions, and two Te sites with site symmetry each. In comparison with the previously reported monoclinic cryolite-type α-form that was prepared at higher temperatures, β-Cd₃TeO₆ has a much lower density and most likely represents a metastable modification. Whereas the [TeO₆] octa-hedra in both polymorphs are very similar and show only minor deviations from ideal valu

SUBMITTER: Weil M 

PROVIDER: S-EPMC6218891 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature