author(s) : Williams
date of publication : 1977
source : Min.Mag.(41) p.27
formula : Cu2Al2(AsO4)2 (OH)4 H2O
comments about the origin : Williams 1979
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP