Citation: Yakubovich, O. V.; Matviyenko, Y. N.; Simonov, M. A.; Melnikov, O. K. (1986). The crystalline structure of synthetic Fe3+-arrojadites with the idealized formula K2Na5Fe2+14Fe3+(PO4)12(OH)2 Note: the number of errors and/or typos in this paper is large. Vestnik Moskovskogo Universiteta Geologiya, 41, pp. 36-47.