author(s) : Nambu, Tanida and Kitamura
date of publication : 1969
source : Journ.Jap.Ass.Min.Petr.Econ.Geol.(62) p.311
formula : (Na,K,Ca)3 (Mn,Mg,Fe,Al)5 (Si4,O11)2 (OH)2
comments about the origin : Nambu 1970
catalog number(s) : 22764
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP