Covers glasses of the rare-earth borate type which contain (wt%) 16-32 B2O3, 25-50 La2O3, and 10.4-23 Al2O3. 14 specific compositions are quoted with RI ranging from 1.7690-1.6530.
Origin
Unknown
Journal Title
Usp 2 996 392, 15/8/61
Sector
Refractive Indexes
Class
RI 21