author(s) : Shepard
date of publication : 1867
source : cited in Pisani,C.R.Acad.Sci.(83)p.166 (1876)
formula : Mg3,2Fe0,8Al2(Al2Si2O10)(OH)8
comments about the origin : Coll.Adam No 2170 donated by Shepard 1875
catalog number(s) : 22950
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP