Why we need cobalt

  title={Why we need cobalt},
  author={M. Hawkins},
  journal={Applied Earth Science},
  pages={66 - 70}
  • M. Hawkins
  • Published 2001
  • Materials Science
  • Applied Earth Science
Abstract The use of cobalt as a colour for glass can be traced back to about 2600 B.C. in Egypt, but it was not until the mid-nineteenth century that it was isolated as a metal or until the early twentieth century that it was used in metallurgical applications. With few exceptions cobalt is obtained as a byproduct of the winning of another metal, mostly nickel or copper, which has meant that supplies have always been largely dependent on nickel or copper production. In spite of this dependence… Expand
using XRF analysis