author(s) : Jak, Johan, Kvacek and Liebscher
date of publication : 1969
source : Neues Jahrb.Min.Monatsch. p.201
formula : SrAl3(OH)6 (SO4)(AsO4)
comments about the origin : Johan 1967
catalog number(s) : 20052
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP