AM_Ferritungstite Formula: (Fe.54 W1.46) Ca.12 Na.04 H2.51 O6.8 K.2 Name: Ferritungstite Unit cell: 10.352 10.352 10.352 90.0 90.0 90.0 , V=1109.36 Space group: FD3M (227)

Ercit T S , Robinson G W , The Canadian Mineralogist , 32 (1994) p.567-574, A refinement of the structure of ferritungstite from Kalzas mountain, Yukon, and, observations on the tungsten pyrochlores, Locality: Kalzas mountain, Yukon, Canada