Hermannjahnite
Hermannjahnite is a rare sulfate mineral with the relatively simple formula CuZn2. It is one of many fumarolic minerals discovered on the Tolbachik volcano.Relation to other minerals
Hermannjahnite is a zinc-analogue of dravertite - another mineral from prolific Tolbachik. Minerals somewhat chemically similar to hermannjahnite include ktenasite and christelite.
