AM_Thulium_1 Formula: Tm Name: Thulium Unit cell: 3.5375 3.5375 5.5546 90.0 90.0 120.0 , V=60.20 Space group: P63/MMC (194)

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