Facts
- Chemical formula
- Ca₄Mg₉Sb₃O₄[Si₆Be₃AlFe₂O₃₆]
- Crystal system
- Triclinic
- Mohs hardness
- 6.0
- Number of elements
- 8
- IMA status
- Approved
- Type locality
- Långban
- Named after
- Wilfred Reinhardt Welsh
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q4018919