Theoparacelsite
Theoparacelsite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Cu₃(OH)₂As₂O₇.
It crystallizes in the orthorhombic crystal system (space group Pmma).
Key properties: specific gravity 4.72; Yellowish green streak; Vitreous to adamantine luster; optically biaxial.
IMA symbol Thp, IMA status: approved, named in 1998.
A secondary mineral within ~1 mm geodes of cuprite.
It is found associated with Olivenite, cornubite, connellite, clinotyrolite, brochantite, malachite, trippkeite, pharmacosiderite, gilmarite, strashimirite, cuprite, native copper.
The mineral was named to honor Swiss scientist Paracelse, who was Philippus Theophrastus van Hohenheim (1493- 1541). Paracelse is a Greek-Roman translation of Hohenheim.