AM_Fluoro-edenite_8 Formula: Si7 Al Mg5 Ca2 Na O22 F2 Name: Fluoro-edenite Unit cell: 9.8535 18.0154 5.2752 90.0 104.892 90.0 , V=904.97 Space group: C12/M1 (12)

Welch M D , Knight K S , European Journal of Mineralogy , 11 (1999) p.321-331, A neutron powder diffraction study of cation ordering in, high-temperature synthetic amphiboles