certainty of origin : Holotype.
author(s) : Johan, Povondra and Slansky
date of publication : 1968
source : Am.Min.(54) p.1-13
formula : NaHCa2Al4(CO3)4 (OH)10
comments about the origin : Johan 1968 <Catalog number : 20051> et 1969
catalog number(s) : 20051
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP