AM_Ushkovite Formula: (Mg.99 Mn.01) (Fe1.98 Al.02) P2 O18 H18 Name: Ushkovite Unit cell: 5.3468 10.592 7.2251 108.278 111.739 71.626 , V=351.59 Space group: P-1 (2)

Galliski M A , Hawthorne F C , The Canadian Mineralogist , 40 (2002) p.929-937, Refinement of the crystal structure of ushkovite from Nevados De Palermo,, Republica Argentina, Locality: Nevados De Palermo, Republica Argentina