A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...
A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...
A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...
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THE <strong>MINERALOGY</strong> OF ANTIMONY. 39<br />
Occurrence,—In the Wenzclgang, Baden ; at Wittiehen in Suabia<br />
and at Andreasberg in the Harz, associated with ores of silver,<br />
native arsenic, galena, etc.; at Allcmont, France; Casalla, Spain; and<br />
in Bolivia, South America.<br />
Diirfeldtite.<br />
Composition.—Analysis gives :—<br />
S 24*15 per cent.<br />
Sb 30-52<br />
Pb . . . . . . 25-81<br />
Ag 7-34<br />
Cu 1-86<br />
Fe . . . . " . . 2*24<br />
Mn 8*08<br />
Properties.—In masses of fibrous structure, and also in fine noodles.<br />
H. = 2*5. G. = 5*4. Colour light gray. Lustre metallic.<br />
Occurrence. —Anquimarca, Peru.<br />
Famatinite.<br />
Composition.—Cu8SbS4 or Cu2S.SbaS6.<br />
Properties.—Orthorhombic. Also massive, llathcr brittle. H. =-<br />
3*5. G-. = 4-57. Colour gray with a tinge of copper-red. Streak<br />
black. Opaque.<br />
Occurre?ice.—With enargite, chalcopyrite, pyrito, (itc, in the Sierra<br />
de Famatina, Argentine Jlopublie; also at Cerro do I^IHOO, Peru.<br />
Freieslebenite.<br />
Composition.—(Pb, Ago)nSbJS11 or 5(Pb, Ag2)S.2Sb2Sn or Pbr)Sb#1Sn.<br />
Properties.—Monoelinic. Habit prismatic; prismatic planes vertically<br />
striated. Bather brittle. H.^2-2'5. G.^ 6-2-6'4. Lustre<br />
metallic. Colour and streak light steel-gray. Fuses easily before<br />
blowpipe.<br />
Occurrence.—At Freiberg, Saxony; at Kapnik, Hungary; at<br />
Folsobanya, Hungary; and at HiciKleleneina, Spain.<br />
Guejarite.<br />
Composition.—OuliSb(jS7 or Cu2S.2Sb2S8.<br />
Pro2>erties.~"Orthorhombic. hi prismatic crystals. (Uves oil'<br />
antimony fumes before blowpipe ; yields metallic copper when treated<br />
with soda.<br />
Occurrence.—At the copper mines at foot of Mu ley-11 aeon, Andalusia.
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