AM_Calcium_5 Formula: Ca Name: Calcium Unit cell: 4.488 4.488 4.488 90.0 90.0 90.0 , V=90.40 Space group: IM3M (229)

Schottmiller J C , King A J , Kanda F A , Journal of Physical Chemistry , 62 (1958) p.1446-1449, The calcium-strontium metal phase system, Locality: synthetic, Sample: at T = 615 C