AM_Arfvedsonite Formula: O23.2 F.8 (Si7.824 Al.176) Mg.31 Fe3.87 Mn.58 Ti.08 Zn.04 Li.17 Na2.415 Ca.08 K.223 H1.2 Name: Arfvedsonite Unit cell: 9.84 18.036 5.365 90.0 104.05 90.0 , V=923.67 Space group: C12/M1 (12)

Hawthorne F C , Ungaretti L , Oberti R , Bottazzi P , Czamanske G K , American Mineralogist , 78 (1993) p.733-745, Li: an important component in igneous alkali amphiboles, Locality: Questa caldera, New Mexico, Sample: A(12)