certainty of origin : Holotype.
author(s) : Gaudefroy, Orliac, Permingeat and Parfenoff
date of publication : 1969
source : Bull.Soc.Fr.Min.Crist.(92) p.185-190
formula : Ca3(Mn,Al)2 (SiO4)2 (OH)4
comments about the origin : Permingeat 1970
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP