AM_Woodruffite
Formula: Mn6.88 Zn1.405 O19.36 H20
Name: Woodruffite
Unit cell: 24.765 2.8473 9.559 90.0 93.77 90.0 , V=672.58
Space group: C12/M1 (12)

Post J E , Heaney P J , Cahill C L , Finger L W , American Mineralogist , 88 (2003) p.1697-1702, Woodruffite: A new Mn oxide structure with 3x4 tunnels, Sample: at T = 100 K