Facts
- Chemical formula
- {Na}{NaMn}{Mg₅}Si₈O₂₂(OH)₂
- Crystal system
- Monoclinic
- Number of elements
- 6
- IMA status
- Approved
- Type locality
- Långban
- Named after
- Sten Anders Hjalmar Sjögren
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q46004287