Tedhadleyite
Tedhadleyite is an IMA-recognized mineral species in the halide class, with the chemical formula Hg²⁺Hg¹⁺₁₀O₄I₂(Cl,Br)₂.
It crystallizes in the triclinic crystal system (space group A-1).
Key properties: Mohs hardness 3; specific gravity 9.43; Red streak; Adamantine to submetallic luster.
IMA symbol Ted, IMA status: approved, named in 2001.
On the wall of a vug in quartz, likely formed, in situ, as a replacement of native mercury, during a period of high activity of I (with lower Cl and Br) in the fluid or vapor phase.
It is found associated with Native mercury, calomel, cinnabar, eglestonite, montroydite, quartz, magnesite.
The mineral was named to honor Ted A. Hadley (b. 1961) of Sunnyvale, California, who participated in the collection of the holotype specimen and for his contributions to mineralogy generally.