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. 41<br />
Miargyrite.<br />
Composition.—AgSbS2 or Ag.,S.Sb2S3.<br />
Properties.—Monoclinic; crystals normally thick tabular. Brittle.<br />
H. = 2*25. G. = 5*1-5*3. Lustre metallic-adamantine. Colour<br />
iron-black to steel-gray, but thin splinters are deep blood-red.<br />
Occurrence.—Braunsdorf, Saxony: Pfibram in Bohemia; and<br />
Clausthal.<br />
Monimolite.<br />
Composition.—An antimonate of lead, iron, and sometimes calcium ;<br />
in part, K3Sb2O8J with R = Pb,Fe = 3 :1.<br />
Properties.—Usually octahedral, also cubic. Also massive and<br />
incrusting. H. = 5*6. G. = 6*58. Lustre greasy to submetallic.<br />
Colour yellowish or brownish green, dark brown to black. Streak<br />
straw-yellow, cinnamon-brown. Translucent to nearly opaque.<br />
Occurrence.—Harstig mine, Wermland, Sweden.<br />
Nadorite.<br />
Composition.—PbClSbO2 or PbSb.O4.PbCl2.<br />
Properties.—Orthorhombic. H. = 3*5-4. G. = 7*02. Lustre<br />
resinous to adamantine. Colour smoky brown to brownish yellow.<br />
Streak yellow.<br />
Occurrence.—Constantine, Algiers.<br />
Plagionite.<br />
Composition.—Perhaps 5PbS.iSb^.<br />
Properties.—Monoclinic. Crystals thick tabular. H. = 2*5.<br />
G. = 5*4. Lustre metallic.<br />
Occurrence.—At Wolfsberg, Arnsberg.<br />
Plumbostannite.<br />
Composition.—Sulphantimonate of lead, tin, and iron.<br />
Properties.—Amorphous, granular. H. = 2. Feel greasy, like<br />
graphite.<br />
Occurrence.—Peru.<br />
Polybasite.<br />
Composition.—Ag2SbS6 or 9Ag2S.SboS3.<br />
Properties.—- Orthorhombic. "H. = 2-3. G. = 6-0-6*2. Lustre<br />
metallic. Colour iron-black. Streak black...<br />
Occurrence.—Mexico; Chili; Pribram.
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