AM_Birnessite_6 Formula: Mn O4.054 Name: Birnessite Unit cell: 5.1342 2.8469 7.4815 90.31 101.559 89.944 , V=107.13 Space group: C-1 (2)

Lopano C L , Heaney P J , Post J E , American Mineralogist , 94 (2009) p.816-826, Cs-exchange in birnessite: Reaction mechanisms inferred from time-resolved, X-ray diffraction and transmission electron microscopy, Note: Solution concentration 0.001 M, Note: Occupancies of the Oint sites are undetermined, O is used only as a scatterer