Facts
- Chemical formula
- Fe²⁺Fe³⁺₂(AsO₄)₂(OH)₂·8H₂O
- Crystal system
- Triclinic
- Number of elements
- 4
- IMA status
- Approved
- Type locality
- Conselheiro Pena
- Named after
- César M. Ferreira
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q19833313