Citation: Pieczka, A.; Hawthorne, F. C.; Ball, N.; Abdu, Y.; Golebiowska, B.; Wlodek, A.; Zukrowski, J. (2018). Graftonite-(Mn), ideally M1MnM2,M3Fe2(PO4)2, and graftonite-(Ca), ideally M1CaM2,M3Fe2(PO4)2, two new minerals of the graftonite group from Poland. Mineralogical Magazine, 82, pp. 1307-1322.