Chivruaiite

Ba_0.025Ca_0.775H_14.986K_0.05Mn_0.1Nb_0.22O_12.73Si₃Sr_0.05Ti_1.03

Men'shikov, Y. P.Krivovichev, S. V.Pakhomovsky, Y. A.Yakovenchuk, V. N.Ivanyuk G YuMikhailova, J. A.Armbruster, T.Selivanova, E. A.

American Mineralogist (2006) 91, 922-928

a=7.1918Å   b=23.166Å   c=6.9472Å

α=90°   β=90°   γ=90°