What's the difference between covelline and covellite?

Covelline


Definition:

  • (n.) Alt. of Covellite

Example Sentences:

Covellite


Definition:

  • (n.) A native sulphide of copper, occuring in masses of a dark blue color; -- hence called indigo copper.

Example Sentences:

  • (1) Optimum conditions for the oxidation of chalcocite were: pH, 1.7 to 2.3; temperature, 35 C; and ferric iron concentration in the range of 0.004 to 0.01 M. For covellite, the optimum conditions were: pH 2.3; temperature, 35 C; and ferric iron concentration in the range of 0.004 to 0.02 M. The energies of activation were determined to be 16.3 kcal (ca.
  • (2) Biodegradation of chalcocite was found to be 90 to 100% and that of covellite 45 to 60%.
  • (3) "Oxygraph" apparatus was used to measure quantitatively the kinetics of oxidation of synthetic covellite (CuS) in the presence and absence of Thiobacillus species.
  • (4) In contrast, all Cu X-ray photoelectron signals of the more tentatively described mixed valence complexes Na2Cu3S3 and the mineral covellite, CuI4CuII2(S2)2S2, could be attributed exclusively to Cu(I).
  • (5) 4.8 X 10(4) J) per mol for chalcocite and covellite, respectively.
  • (6) The microbiological oxidation of synthetic chalcocite and covellite has been investigated using an adapted strain of Thiobacillus ferrooxidans.

Words possibly related to "covelline"

Words possibly related to "covellite"