The composition range is (wt%): SiO2 0-10, B2O3 2-20, Al2O3 0-2, Sum of the above 7.5-25, TiO2 1-16, ZrO2 0-10, La2O3 35-55, Y2O3 0.5-10, Nb2O5 0.5-15, Gd2O3 0-10, Ta2O5 0-15, P2O5 0-3.
Origin
Unknown
Journal Title
Gb 2 150 555A, 3/7/85
Sector
Refractive Indexes
Class
RI 42