author(s) : Chao
date of publication : 1978
source : Canad.Min.(16) p.561
formula : (Na,K)6 (Y,Ca)2 Si16O38 10H2O
comments about the origin : etiquette Carleton Univ., Chao 1976
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP