AM_Pyrolusite Formula: Mn O2 Name: Pyrolusite Unit cell: 4.396 4.396 2.871 90.0 90.0 90.0 , V=55.48 Space group: P42/MNM (136)

Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: beta phase of MnO2, rutile structure