AM_Hornblende Formula: Al2.42 Si6.44 Fe1.846 Mg2.224 Ti.07 Ca1.802 Na.628 O24 H2 Name: Hornblende Unit cell: 9.813 18.055 5.321 90.0 104.97 90.0 , V=910.75 Space group: C12/M1 (12)

Phillips M W , Draheim J E , Popp R K , Clowe C A , Pinkerton A A , American Mineralogist , 74 (1989) p.764-773, Effects of oxidation-dehydrogenation in tschermakitic hornblende, sample H-1, natural