author(s) : Milton, Axelrod and Grimaldi
date of publication : 1955
source : Am.Min.(40) p.326
formula : Na2Mg(CO3)2
comments about the origin : Milton 1974 (No4247.65.4247.90)
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP