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High-alkali silicate glasses M-27 containing chloride additives (MCl, where M = Na and K) introduced in the course of synthesis (0, 1, 5, 10, 12.5 wt % Cl) are investigated. The glasses synthesized are analyzed for chlorine content, and their thermal and electrical characteristics are measured. The upper limits of the chlorine content in the glasses are determined. The nonlinear dependence of the...