Ytterbium Spedding F H, Daane A H, Herrmann K W Acta Crystallographica 9 (1956) 559-563 The crystal structures and lattice parameters of high-purity scandium, yttrium and the rare earth metals Locality: synthetic Note: sample 99.9% pure _database_code_amcsd 0009179 5.4862 5.4862 5.4862 90 90 90 Fm3m atom x y z Yb 0 0 0