AM_Erbium_1 Formula: Er Name: Erbium Unit cell: 3.55 3.55 5.59 90.0 90.0 120.0 , V=61.01 Space group: P63/MMC (194)

Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York, Sample at T = 43 K, Hexagonal closest packed, hcp, structure