AM_Arfvedsonite_1 Formula: O23.7 F.3 Si7.928 Al.112 Mg.04 Fe4.48 Ti.06 Zn.02 Li.22 Mn.14 Na2.231 Ca.05 K.521 H1.7 Name: Arfvedsonite Unit cell: 9.986 18.042 5.314 90.0 103.92 90.0 , V=929.29 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, Sample: A(13)