author(s) : Strunz
date of publication : 1960
source : Neues Jajrb.Min.Monatsch. p.1
formula : (Na,K)(Mg,Zn)2 H(AsO4)2 4H2O
comments about the origin : Strunz
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP