Light micrograph taken with Normarski differential interference contrast (DIC)of a sample of high purity 99,8% electrolytic cobal metal. The transition metal cobalt (Co). Cobalt is a hard,silver-white metal that is combined with other metals to make various alloys. It is used to make magnets,pigments,battery electrodes,magnetic recording media,diamond tools,high-speed steels,and cemented carbides. A radioactive isotope of cobalt,cobalt-60,is used as a medical tracer and in the treatment of some forms of cancer. Horizontal object size of this section: 1.2 mm |