Oberwolfachite
Oberwolfachite is an IMA-recognized mineral species in the arsenate class, with the chemical formula SrFe³⁺₃(AsO₄)(SO₄)(OH)₆.
It crystallizes in the hexagonal crystal system (space group R-3m). It is a member of the Alunite structural group.
Key properties: Mohs hardness 5; specific gravity 3.874; Brownish yellow streak; Adamantine luster.
IMA status: approved, named in 2021.
Secondary in a low-temperature association.
It is found associated with Quartz, baryte, hematite, illite, goethite, beudantite, dussertite (Clara); arsenogoyazite, jarosite, graulichite-(Ce), goethite, hematite (Monterniers).
The name refers to the Oberwolfach baryte mining area where the studied material was collected first.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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