AM_Janhaugite Formula: (Na2.31 Ca.69) Mn3 (Ti1.4 Zr.6) Si4 O16 F2 Name: Janhaugite Unit cell: 10.668 9.787 13.931 90.0 107.82 90.0 , V=1384.72 Space group: P121/N1 (14)

Annehed H , Falth L , Raade G , Neues Jahrbuch fur Mineralogie, Monatshefte , 1985 (1985) p.7-18, The crystal structure of janhaugite, a sorosilicate of the cuspidine family