Outstanding colorless single crystal aggregate of the extremely rare NH4-Fe-sulphate minerals lonecreekite, sabieite and clairite from the type locality for all of them in Lone Creek Falls, Sabie, Southafrica. Ex Vandenbroucke Museum collection from Waregem, Belgium. Analyzed specimen by the former owner of the specimen. — Photo: David Hospital · CC BY 4.0
Sabieite
An ammonium-iron sulfate from the Lone Creek Falls cave near Sabie, South Africa.
Intro adapted from Wikipedia (CC BY-SA).
Sabieite is an IMA-recognized mineral species in the sulfate class, with the chemical formula (NH₄)Fe³⁺(SO₄)₂.
It crystallizes in the hexagonal crystal system (space group P321). It is a member of the Sabieite structural group.
Key properties: specific gravity 2.36.
IMA symbol Sbi, IMA status: approved, named in 1982.
Formed by dehydration of lonecreekite.
It is found associated with Lonecreekite, tschermigite.
The name refers to its occurrence near Sabie, South Africa.