author(s) : Bussen, Menshikov, Merkov, Nedorezova, Uspenskaya and Khomyakov
date of publication : 1974
source :
formula : (Na,Ca)4 (Ti,Zr)2 Si8O32 5H2O
comments about the origin : coll.Khomyakov ech. Stepanov I.M.G.R.E. Moscou 1979 "cotype"
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP