AM_Mn-foitite_4 Formula: Na.673 Ca.016 K.007 Al7.278 Mn1.311 Li.447 Ti.042 B3 Si5.922 F.409 O30.591 H3.392 Name: Mn-foitite Unit cell: 15.9461 15.9461 7.138 90.0 90.0 120.0 , V=1571.87 Space group: R3M (160)

Bosi F , Agrosi G , Lucchesi S , Melchiorre G , Scandale E , American Mineralogist , 90 (2005) p.1661-1668, Mn-tourmaline from island of Elba (Italy): Crystal chemistry., Sample: Tsl2g