author(s) : Ruotsala and Babcock
date of publication : 1977
source : Am.Min.(62) p.1125
formula : Al12(SO4)5 (OH)26 20H2O
comments about the origin : Ruotsala 1978
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP