AM_Ferri-eckermannite_1
Formula: Si7.92 Al.16 Mg3.34 Fe1.174 Mn.126 Ti.04 Li.24 Na2.45 Ca.1 K.2 H2 O23.58 F.42
Name: Ferri-eckermannite
Unit cell: 9.779 17.888 5.287 90.0 103.85 90.0 , V=897.95
Space group: C12/M1 (12)

Hawthorne F C , Ungaretti L , Oberti R , Cannillo E , American Mineralogist , 79 (1994) p.443-451, The mechanism of Li incorporation in amphiboles, Sample: A5