AM_NpOS Formula: Np O S Name: NpOS Unit cell: 3.825 3.825 6.654 90.0 90.0 90.0 , V=97.35 Space group: P4/NMM (129)

Wyckoff R W G , Crystal Structures , 1 (1963) p.294-296, Second edition. Interscience Publishers, New York, New York, Note: tetragonal PbFCl structure