certainty of origin : Holotype.
author(s) : Johan, Laforet, Picot and Feraud
date of publication : 1973
source : Bull.Soc.Fr.Min.Crist.(96) p.131-134
formula : As4S
comments about the origin : Feraud 1973
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP