author(s) : Williams
date of publication : 1972
source : Min.Mag.(38) p.541-544
formula : Cu3Al4(PO4)3 (OH)9 4H2O
comments about the origin : Williams 1971
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP