AM_Gjerdingenite-Fe
Formula: K2.52 Na.72 O34.74 Ca.02 Fe.56 Mn.38 Nb2.16 Ti1.72 Zr.04 Si8 H20
Name: Gjerdingenite-Fe
Unit cell: 14.529 13.943 7.837 90.0 117.61 90.0 , V=1406.81
Space group: C12/M1 (12)

Raade G , Ferraris G , Gula A , Ivaldi G , The Canadian Mineralogist , 40 (2002) p.1629-1639, Gjerdingenite-Fe from Norway, a new mineral species, in the labuntsovite group: Description, crystal, structure and twinning, Locality: Norway