Facts
- Chemical formula
- Ca₃(Al,Mn³⁺)₂(SiO₄)₂(OH)₄
- Crystal system
- Tetragonal
- Mohs hardness
- 6.0
- Number of elements
- 6
- IMA status
- Approved
- Type locality
- Wessels mine
- Named after
- Dan Holtstam
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q3786370