Citation: Vignola, P.; Hatert, F.; Baijot, M.; Rotiroti, N.; Risplendente, A.; Varvello, S. (2019). Jahnsite-(MnMnMg), Mn2+Mn2+Mg2+2Fe3+2(PO4)4(OH)2*8H2O, a new phosphate mineral species from Sapucaia pegmatite, Sapucaia Do Norte, Galileia, Minas Gerais, Brazil. The Canadian Mineralogist, 57, pp. 363-370.