Citation: Nagashima, M.; Akasaka, M.; Kyono, A.; Makino, K.; Ikeda, K. (2007). Distribution of chromium among the octahedral sites in chromian epidote from Iratsu, central Shikoku, Japan Sample: CrEp1. Journal of Mineralogical and Petrological Sciences, 102, pp. 240-254.
Formula: Al2.43 Ca1.86 Cr0.09 Fe0.48 H O13 Si3 Sr0.14