Facts
- Chemical formula
- Pb₁₈Fe³⁺₄[Si₄(Si,Fe³⁺)₆][Pb₄Si₁₆(Si,Fe)₄]O₈₂Cl₆
- Crystal system
- Hexagonal
- Number of elements
- 5
- IMA status
- Grandfathered
- Type locality
- Långban
- Named after
- John Bernard Jago Trelawney
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q3806119