Menezesite

Ba_2.21Ca_0.31Fe_0.23H₄₈K_0.53Mg_0.935Mn_0.23Nb_9.22O₅₄Ta_0.36Th_0.55Ti_3.25Zr_2.74

Atencio, D.Coutinho, J. M. V.Doriguetto, A. C.Mascarenhas, Y. P.Ellena, J.Ferrari, V. C.

American Mineralogist (2008) 93, 81-87

a=13.017Å   b=13.017Å   c=13.017Å

α=90°   β=90°   γ=90°