Orange crystals of the extremely rare mercury mineral terlinguacreekite associated to sharp yellow kleinite crystals. Terlinguacreekite is one of the rarest mercury minerals known, with only two localities known worldwide. From: McDermitt Mine, Humboldt County, Nevada, United States of America. — Photo: David Hospital · CC BY-SA 4.0
Terlinguacreekite
Terlinguacreekite is an IMA-recognized mineral species in the halide class, with the chemical formula Hg²⁺₃O₂Cl₂.
It crystallizes in the orthorhombic crystal system.
Key properties: specific gravity 9.899; Yellow streak; Vitreous luster.
IMA symbol Tck, IMA status: approved, named in 2004.
Forms secondarily through alteration of cinnabar or native mercury as granular crusts.
It is found associated with Calcite (Mariposa mine); kleinite, calomel (McDermit Mine).
The name commemorates Terlingua Creek, which flows in the Terlingua mining district, Texas.