Citation: Yakovenchuk, V. N.; Krivovichev, S. K.; Pakhomovsky, Y. A.; Ivanyuk, G. Y.; Selivanova, E. A.; Men'shikov, Y. P.; Britvin, S. N. (2007). Armbrusterite, K5Na6Mn3+Mn2+14[Si9O22]4(OH)10*4H2O, a new Mn hydrous heterophyllosilicate from the Khibiny alkaline massif, Kola Peninsula, Russia. American Mineralogist, 92, pp. 416-423.