author(s) : Peacor, Essene, Simmons and Bigelow
date of publication : 1974
source : Am.Min.(59) p.1152-1156
formula : (Mn,Mg)2 Al(SiAl)O5(OH)4
comments about the origin : Peacor 1974
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP