AM_Hedenbergite_29 Formula: (Ca.503 Na.497) Fe Si2 O6 Name: Hedenbergite Unit cell: 9.7361 8.902 5.2733 90.0 106.099 90.0 , V=439.12 Space group: C12/C1 (15)

Redhammer G J , Amthauer G , Roth G , Tippelt G , Lottermoser W , American Mineralogist , 91 (2006) p.1271-1292, Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer, spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution, Locality: synthetic, Sample: Ae504, T = 200 K