Facts
- Chemical formula
- K₅Na₇Mn₁₅[(Si₉O₂₂)₄](OH)₁₀ * 4H₂O
- Crystal system
- Monoclinic
- Mohs hardness
- 3.5
- Number of elements
- 6
- IMA status
- Approved
- Type locality
- Kukisvumchorr
- Named after
- Thomas M. Armbruster
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q680482