Belloite
A copper oxychloride discovered in 1998 at a mine in Sierra Gorda, Chile, named for Andrés Bello, founder of the University of Chile.
Intro adapted from Wikipedia (CC BY-SA).
Belloite is an IMA-recognized mineral species in the halide class, with the chemical formula Cu(OH)Cl.
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: specific gravity 3.79; Yellowish green streak; Vitreous luster.
IMA symbol Bll, IMA status: approved, named in 1998.
Found in a desert at abandoned copper mines (Chile). An alteration product of fumarolic sublimates (Russia). In a desert guano deposit (Chile).
It is found associated with Nitratine, montmorillonite, paratacamite, atacamite, gunningite, alunite, natrojarosite.
The mineral was named to honor Andrés Bello (1780-1865), founder and first rector of the University of Chile.