CAS 7440-27-9 appears in our catalog under these names: Terbium ingot, 99.9% (REO), Ta <0.4% , Terbium powder, -40 mesh, 99.9% (REO) , Terbium pieces, 99.9% (REO) , Terbium foil, 0.62mm (0.024in) thick, 99.9% (REO) , Terbium rod, 12.7mm (0.50in) dia, 99.9% (metals basis exclud. Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 2g, 10g, 1g , 5g , 1g, 5g, 25x25mm, 50x50mm.