author(s) : Scacchi
date of publication : 1876
source : Rendiconto R.Accad.Napoli, 14 octobre
formula : Ca4(Si2O7)(F,OH)2
comments about the origin : coll.Adam No2418 etiquette Scacchi, obtenu par Bertrand en 1877
catalog number(s) : 20335
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP