Ref.: F. Hatert, P. Lefèvre, A.M. Fransolet, M.R. Spirlet, F. Fontan, P. Keller (2004): "Ferrorosemaryite, []NaFe2+Fe3+Al(PO4)3, a new phosphate mineral from the Rubindi pegmatite, Rwanda", Bull. Liaison S.F.M.C.: 16: 44-45; Hatert, F., Lefevre, P., Fransolet, A.-M., Spirlet, M.-R., Rebbouh, L., Fontan, F., and Keller, P. (2005)Ferrorosemaryite, NaFe 2+ Fe 3+ Al(PO4)3, a new phosphate mineral from the Rubindi pegmatite, Rwanda. European Journal of Mineralogy: 17(5): 749-759.
Granitic pegmatite.