certainty of origin : Holotype.
author(s) : Levy and Picot
date of publication : 1961
source : Bull.Soc.Fr.Min.Crist.(84) p.312-317
formula : Os
comments about the origin : Picot et Levy 1966
catalog number(s) : 12098
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP