The RI is at least 1.83. The composition is (wt%): 25-30 TiO2, 45-59 BaO, 3-10 B2O3 and 13-20 Al2O3, either alone or together with one or more further constituents, the four specified constituents making up at least 95% of the total.
Origin
Unknown
Journal Title
Sap 66/0338, 26/7/66
Sector
Refractive Indexes
Class
RI 50