AM_Ramsdellite Formula: Mn O2 Name: Ramsdellite Unit cell: 9.2734 2.8638 4.5219 90.0 90.0 90.0 , V=120.09 Space group: PNMA (62)

Post J E , Heaney P J , American Mineralogist , 89 (2004) p.969-975, Neutron and synchrotron X-ray diffraction study of the structures, and dehydration behaviors of ramsdellite and groutellite