AM_Augite Formula: Ca.61 Fe.13 Mg.43 Mn.01 K.17 Na.05 Al Si1.61 O6 Name: Augite Unit cell: 9.773 8.926 5.269 90.0 105.75 90.0 , V=442.38 Space group: C12/C1 (15)

Bindi L , Safonov O G , Yapaskurt V O , Perchuk L L , Menchetti S , American Mineralogist , 88 (2003) p.464-468, Ultrapotassic clinopyroxene from the Kumdy-Kol microdiamond mine, Kokchetav, Complex, Kazakhstan: Occurrence, composition and crystal-chemical characterization