Facts
- Chemical formula
- KCa₂(Fe²⁺₄Al)(Si₆Al₂)O₂₂(OH)₂
- Crystal system
- Monoclinic
- Mohs hardness
- 6.0
- Number of elements
- 7
- IMA status
- Redefined
- Type locality
- Kameyama
- Named after
- Potassium
- Colour
- black
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q17166284