Facts
- Chemical formula
- (Ni,Co)₃₀(As₂O₇)₁₅
- Crystal system
- Monoclinic
- Number of elements
- 4
- IMA status
- Approved
- Type locality
- Johanngeorgenstadt
- Named after
- Peter A. Williams
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q3900981