author(s) : Frondel and Ito
date of publication : 1966
source : Am.Min.(51) p.1107
formula : K(Zn,Mn)3 (AlSi3O10)(OH)2
comments about the origin : etiquette Harvard Univ., Frondel 1975
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP