author(s) : Galli, Passaglia and Pongiluppi
date of publication : 1974
source : Contr.Min.Petr.(45) p.99-105
formula : K2CaMg2(Al,Si)36 O72 28H2O
comments about the origin : Passaglia 1974
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP