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It occurs in nature as argentite, an important ore of silver.
What we have here is about forty tons of argentite with a very high silver content."
It exists in the ground as acanthite and argentite.
Silver minerals include argentite and native silver.
Argentite was found in most of the primary ores and was probably an abundant primary silver mineral.
The mineral was mentioned 1529 by G. Agricola, but the name argentite (from the Lat.
A workman named Ray Wiley remembers "it was fine grained argentite - high grade silver ore."
Silver glance (Argentite)
As argentite cools below that temperature its cubic form is distorted to the monoclinic form of acanthite.
"It's argentite," Lawrence said.
In the Comstock lode in Nevada massive stephanite and argentite are important ores of silver.
Deposits of freieslebenite can generally be located in proximity with minerals argentite, siderite, freibergite, polybasite, and aramayoite.
The metal occurs naturally in its pure, free form (native silver), as an alloywith gold and other metals, and in minerals such as argentite and chlorargyrite.
Acanthite, AgS, crystallizes in the monoclinic system and is the stable form of silver sulfide below 173 C. Argentite is the stable form above that temperature.
The name argentite refers to a cubic form, which, due to instability in "normal" temperatures, is found in form of the pseudomorphosis of acanthite after argentite.
Three forms are known: monoclinic acanthite, stable below 179 C, body centered cubic so-called argentite, stable above 179 C, and a high temperature face-centred cubic form stable above 586 C. The higher temperature forms are electrical conductors.
Argentite was primarily treated as a mineral belonging to the galena group, cubic silver sulfide (AgS), occasionally found as uneven cubes and octahedra, but more often as dendritic or earthy masses, with a blackish lead-grey color and metallic lustre.
Silver glanced up sharply, then looked at the demon.
In-" He paused for a swift silver glance at the boardclock. "
Silver glance (Argentite)
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