Citation: Rozhdestvenskaya, I.V.; Nikishova, L.V.; Lazebnik, Yu.D.; Lazebnik, K.A. (1989). The crystal structure of tokkoite and its relation to the structure of tinaksite. Zeitschrift fuer Kristallographie (149,1979-), 189, pp. 195-204.
Formula: Ca3.6 Fe0.4 H2 K1.85 Na0.15 O20 Si7
Chemical name:(K1.85 Na0.15) (Ca3.6 Fe0.4) (Si7 O18 (O H)) (O H)