Cerargyrite


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Related to Cerargyrite: Horn silver

cerargyrite

[sa′rär·jə‚rīt]
(mineralogy)
AgCl A colorless to pearl-gray mineral; crystallizes in the isometric system, but crystals, usually cubic, are rare; a secondary mineral that is an ore of silver. Also known as chlorargyrite; horn silver.

Cerargyrite

 

horn silver, a mineral of the chloride class; chemical composition, AgCl (75.26 percent silver).

Cerargyrite contains an admixture of bromine and, more rarely, mercury. The structure is of the NaCl type but with covalent bonds between the atoms, so that the mineral is malleable and easily shaved. The crystals are rarely in a cubic system; usually there are solid wax-like masses of a gray to dark brown color. The hardness is 2.5 on the mineralogical scale; the density is 5,556 kg per cu m. Cerargyrite forms in the oxidation zone of ore deposits containing primary silver minerals, and it is a very rich silver ore.

References in periodicals archive ?
Pedrazzini to the Egleston Collection at the Columbia School of Mines, where there are also a number of other specimens of polybasite and stephanite, as well as a remarkable specimen representing the transition of an argentite crystal into cerargyrite and a fine embolite.
The first being base metal sulphides high in silver, especially argentiferous galena and the so called "dry ores" containing native silver, argentine, and cerargyrite.
All of the ore in this reserve was in the form of free gold and cerargyrite (horn silver).