author(s) : Spencer and Mountain
date of publication : 1926
source : Min.Mag.(21) p.149-155
formula : PbHAsO4
comments about the origin : etiquette British Museum No1926-205
catalog number(s) : 16798
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP