Citation: Sokolova, E.; Hawthorne, F. C.; Pautov, L. A.; Agakhanov, A. A. (2010). Byzantievite, Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O21[(OH),F]43(H2O)1.5: the crystal structure and crystal chemistry of the only known mineral with the oxyanions (BO3), (SiO4) and (PO4). Mineralogical Magazine, 74, pp. 285-308.