author(s) : Passaglia and Galli
date of publication : 1977
source : Tschermaks Mineral.Petr.Mitt.(24) p.57
formula : Ca4Al4Si4O6(OH)24 3H2O
comments about the origin : etiquette Museo Civico di Storia Naturale, Milano, ech.Musee de Milan 1977 ("cotype")
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP