AM_Calcium_7 Formula: Ca Name: Calcium Unit cell: 2.615 2.615 2.615 90.0 90.0 90.0 , V=17.88 Space group: PM3M (221)

Olijnyk H , Holzapfel W B , Physics Letters , 100A (1984) p.191-194, Phase transitions in alkaline earth metals under pressure, Locality: synthetic, Sample: P = 39 GPa