This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ...chalcopyrite or sphalerite. Streak black, or reddish brown. Composition varies greatly, M' being usually replaced to large extent by lead, copper, mercury, silver, iron, or zinc; R'" indicates antimony and arsenic, depending upon composition. The following varieties are often differentiated, --'cupriferous and ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ...chalcopyrite or sphalerite. Streak black, or reddish brown. Composition varies greatly, M' being usually replaced to large extent by lead, copper, mercury, silver, iron, or zinc; R'" indicates antimony and arsenic, depending upon composition. The following varieties are often differentiated, --'cupriferous and arsenical, tcnnanlite; argentiferous, freibergite; mercurial, schwatzite. Occurs commonly in veins with chalcopyrite, sphalerite, galena, bournonite, pyrite, quartz, siderite, and barite. Found at Freiberg, Saxony; Clausthal, Hartz Mountains; Pribram, Bohemia; Kapnik, Hungary; Mexico; Chile; Peru; Bolivia; excellent crystals at Birtgham, Utah; many places in Colorado; Montana; Nevada; and Arizona. An important ore of copper and silver. (b) General Formula, MMl"'., . + Only one mineral with a composition conforming to the above formula is sufficiently common to warrant a description. ENARGITE, Cu6As2S8. Orthorhombic, bipyramidal class. Small prismatic, crystals, vertically striated; rare. Usually in compact, granular, or columnar masses. Perfect prismatic cleavage. Uneven fracture. Hardness 3. Specific gravity 4.4. Submetallic luster. Grayish black to iron black in color. In artificial light resembles sphalerite. Streak black. Opaque. Cu6As2S8, may contain some iron, zinc, and antimony. In veins with other copper minerals, such as chalcopyrite, bornite, chalcocite, tetrahedrite, also pyrite. Not common in Europe. More extensive in Peru; Argentina; Chile; Bolivia; Mexico; Island of Luzon, Philippines; in large quantities in the copper mines at Buttc, Montana; also in San Juan Mountains, Colorado; Tintic district, Utah. A very important ore of copper. Also a source of arsenious oxide. 3. OXIDES AND HYDROXIDES Aside from water, thirteen minerals o...
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New. Sewn binding. Cloth over boards. 576 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
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