The existence of anionic conductivity in halogen‐containing lead silicate glasses was proved by Tubandt tests and electron microprobe examinations. Direct‐current volume resistivities, loss tangents, and dielectric constants are reported for analogous glasses containing F − , Cl − , Br − , and I − and compared to those of the parent glass. The densities of the materials do not correlate with the dielectric‐constant data.
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Schultz et al. (1973) studied this question.