author(s) : Gabrielson
date of publication : 1956
source : Ark.Min.Geol.(2) p.133
formula : (Mn,Mg,Cu)5 (AsO3)3 (OH,Cl)
comments about the origin : etiquette Naturhistorika Riskmuseet Gabrielson 1975
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP