Bideauxite
Bideauxite is an IMA-recognized mineral species in the halide class, with the chemical formula AgPb₂F₂Cl₃.
It crystallizes in the cubic crystal system (space group Fd3m).
Key properties: Mohs hardness 3; specific gravity 6.274; White streak; Adamantine, dull after exposure to light luster; optically isotropic.
IMA symbol Bdx, IMA status: approved, named in 1969.
Rarely enclosing and replacing boleite, with other oxidized Pb and Cl minerals, from an oxidized base-metal mineral deposit (Tiger, Arizona, USA).
It is found associated with Boleite, diaboleite, matlockite, leadhillite, anglesite, cerussite, dioptase, covellite, quartz (Tiger, Arizona, USA); boleite, atacamite (Iquique, Chile).
The name refers to Richard August Bideaux (1935–), of Oro Valley, Arizona, USA, American mineralogist and mineral collector.