Covers 72 glass compositions in the ranges (wt%): 35-36 B2O3, 43-50 La2O3, 14-21 ThO2, 0-0.5 Li2O, 0-2.5 Ta2O5; 39-40 B2O3, 54-56 La2O3, 4-6 ThO2; 39.5-41 B2O3, 44-47 La2O3, 0.5-1 Li2O, 11.5-15 ThO2; 42-44 B2O3, 49.5-51 La2O3, 0.5 ThO2, 1.8-4.5 BaO, 0.5-2 CaO; 42-44 B2O3, 53-55 La2O3, 1.5-2 BaO, about 1 ZnO; about 31 B2O3, 41.5 La2O3, 27.5 ThO2 with 4-10 Ta2O5.
Origin
Unknown
Journal Title
Usp 3 082 101, 19/3/63
Sector
Refractive Indexes
Class
RI 15