Facts
- Chemical formula
- Na₂(CO₃)
- Crystal system
- Hexagonal
- Mohs hardness
- 3.0
- Density
- 2.65 g/cm³
- Number of elements
- 3
- IMA status
- Approved
- Type locality
- Ol Doinyo Lengai
- Named after
- John Walter Gregory
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q3776579