Mica‐Like Tellurites of Calcium, Strontium, and Cadmium

Abstract

The compounds CaTe 2 O 5 , SrTe 2 O 5 , and CdTe 2 O 5 were obtained as mica‐like plates by slowly cooling their melts. Dielectric properties were similar to those of mica. Optical and infrared spectra showed appreciable transmittance from 0.33 to 7 μm on with a cutoff at 10 μm. The compounds have refractive indices greater than 2. X‐ray diffraction studies showed that only the calcium and cadmium compounds are isomorphous; tentative structures, accounting for the marked cleavage, are proposed for these materials on the basis of the geometric distribution of X‐ray scattering.