Facts
- Chemical formula
- Ca₄Al₄(SO₄)F₂(OH)₁₆*₂H₂O
- Crystal system
- Tetragonal
- Mohs hardness
- 3.0
- Number of elements
- 6
- IMA status
- Approved
- Type locality
- Hinterweiler
- Named after
- Fred Kruijen
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q57846015