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Topic: Pyrargyrite

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	PYRARGYRITE - Online Information article about PYRARGYRITE (Site not responding. Last check: 2007-10-08)
		The angles are nearly the same in the two species; the rhombohedral angle re' being 71° 22' in pyrargyrite and 72° 12' in proustite.
		The hexagonal prisms of pyrargyrite are usually terminated by a See also:
		Dimorphous with pyrargyrite and proustite respectively are the rare See also:
	encyclopedia.jrank.org /PRE_PYR/PYRARGYRITE.html (692 words)

	SILVER - LoveToKnow Article on SILVER (Site not responding. Last check: 2007-10-08)
		This is illustrated by the hexagonal pyrargyrite 3Ag1S~SbzS1, and proustite, 3AgISAs2S1, and the monoclinic pyrostilpnite, isomeric with pyrargyrite, and xanthoconite, isomeric with proustite.
		This salt, insoluble in water but soluble in brine, also acts upon argentite (Ag2S+CuiCli=2AgCl+CuS+Cu) and pyrargyrite (2AgiSbSi+CuiCli 2AgC1 +Ag2S +2Ag+2CuS+Sb2Si), and would give with silver sulphide in the presence of quicksilver, the Patioreaction; metallic silver, cupric suiphide, and mercurous chloride (2Ag2S+CuiCli+2Hg =4Ag+2CuS+Hg2Cli), but the iron decomposes the quicksilver salt, setting free the quicksilver.
		Thus Austin found that at the Charleston mills, Arizona, 92~ 13% of the total silver recovered was extracted after 1 hour, 94.10% after 2 hours, 95.92% after 3 hours, and 100% after 4 hours.
	32.1911encyclopedia.org /S/SI/SILVER.htm (6686 words)

	Society of American Silversmiths - Glossary
		Silver is usually found combined with other elements (of which sulfur is the most predominant) in minerals and ores.
		Some of the important silver minerals are cerargyrite (or horn silver), pyrargyrite, sylvanite, and argentite.
		Silver also occurs as a constituent of lead, copper, and zinc ores, and half the world production of silver is obtained as a by-product in the processing of such ores.
	www.silversmithing.com /glossary.htm (2957 words)

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