Copper-colored spots--generally in a first coat on iron and not easily
covered with a second coat. Copperheads are spots of excessive oxidation
with red iron oxide producing the color. Bryant
Notched bars of commercial copper used for casting purposes. The notches
are provided for convenience in breaking the bars. Mersereau, 2
Impregnation with copper, or with some compound containing copper.
A miners' name for chalcophyllite. Weed, 1
See:niccolite; nickeline.
A mixture of various copper minerals, such as green malachite, green or
blue chrysocolla, blue azurite, and red cuprite. Schaller
A jet black to brownish pitchlike material carrying from 12.12% to 84.22%
CuO and found in the oxidized zone. It has a conchoidal fracture, and
where it occurs in large enough pieces may resemble obsidian or anthracite
coal. It apparently may be a mixture of the hydrous oxides of copper and
iron, oxide and carbonate of copper, oxide and silicate of copper, or more
or less hydrated oxides of copper and manganese. All the varieties may
have more or less chalcedony mixed with them. Hess
Impure copper that has been precipitated from copper-bearing solutions; it
may contain iron and arsenic; cement copper. Camm
copper-precipitation drum operator
In ore dressing, smelting, and refining, one who precipitates copper from
mine water by tumbling mine water and shredded steel cans in a revolving
drum. DOT
See:chalcopyrite
Minute globules thrown up from the surface of molten copper, when it
contains but little suboxide. Fay
The process involves heating oxidized copper ore with a reducing agent and
a halide salt at about 700 degrees C to produce metallic copper, which may
then be recovered by ammonia leaching or by flotation with conventional
copper sulfide collectors. Rampacek
Slate impregnated with copper minerals. Fay
The gases from the calcination of copper sulfide ore. The gases contain
sulfur dioxide, SO2 . Fay; Hess
See:cuprite
See:chalcanthite; copper sulfate pentahydrate.
CuSO4 .5H2 O ; blue; triclinic; loses 5H2 O at 150
degrees C; white when dehydrated; slowly effloresces in air. Used in ore
flotation and as a source of copper.
CCD, 2; Handbook of Chemistry and Physics, 2; Lee
a. A source of copper.
b. See:covellite; cupric sulfide; indigo copper. CF:digenite
CuTiO3 . Sometimes added in quantities up to 2% to BaTiO3 to
increase the fired density. Dodd
See:uranite; torbernite.
See:chalcanthite