AM_Hedenbergite_39 Formula: (Na.4 Ca.6) Fe Si2 O6 Name: Hedenbergite Unit cell: 9.7598 8.9277 5.2748 90.0 106.041 90.0 , V=441.71 Space group: C12/C1 (15)

Redhammer G J , Amthauer G , Lottermoser W , Treutmann W , European Journal of Mineralogy , 12 (2000) p.105-120, Synthesis and structural properties of clinopyroxenes of the, hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series, Sample: ae40/20