The open encyclopedia of minerals
Mineralogist.org
Minerals A–ZSearchCollectionsBrowse by PropertyIdentify a SpecimenCompare MineralsLocalities MapGlossaryContribute Search the Database →
Halide

Coccinite

HgI₂
Crystal systemTetragonal
ClassHalide
Coccinite specimen

Coccinite, from Backofen Mine, Landsberg, Palatinate, Rhineland-Palatinate, Germany — Photo: David Hospital - www.purple-sky-minerals.com · CC BY-SA 3.0

Coccinite

A rare red mercury iodide first found at Casas Viejas, Mexico.

Intro adapted from Wikipedia (CC BY-SA).

Coccinite is an IMA-recognized mineral species in the halide class, with the chemical formula HgI₂.

It crystallizes in the tetragonal crystal system (space group P4_2/nmc).

IMA symbol Cci, grandfathered status — known before the IMA’s founding, named in 1845.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet. Browse more C minerals or help write this entry.