can't read?
Erbium(III) oxide, is synthesized from the lanthanide metal erbium. It has a pink color with a cubic crystal structure.
EO 105 (OTTO) Erbium oxide nanopowder, APS 41-53 nm, 99.9% Cas 12061-16-4 - used as a dopants for optical fiber and laser materials, Tunned insulator for Josephson junctions, Up-conversion material.