Glasses of RI at least 1.68 contained (wt%) 36-50 B2O3, 26-44 La2O3, 5-19 CaO, and at most 11 ZrO2. 11 specific compositions and properties are quoted.
Origin
Unknown
Journal Title
Usp 2 861 000, 18/11/58
Sector
Refractive Indexes
Class
RI 30