AM_Zussmanite Formula: K.92 Na.07 (Fe10.92 Mg2.08) Si17 Al O56 H14 Name: Zussmanite Unit cell: 11.66 11.66 28.69 90.0 90.0 120.0 , V=3377.99 Space group: R11-3 (1)

Lopes-Vieira A , Zussman J , Mineralogical Magazine , 37 (1969) p.49-60, Further detail on the crystal structure of zussmanite, Locality: Laytonville district, Mendocino County, California