China Erbium Oxide, Er2o3/Treo: 99.9% Min, Formula: Er2o3 CAS No.: 12061-16-4, Find details about China Rare Earth Oxide, Formula: Er2o3 from Erbium Oxide, Er2o3/Treo: 99.9% Min, Formula: Er2o3 CAS No.: 12061-16-4