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a silvery-gray, brittle semi-metal. it rarely occurs in nature as a native element, but is found in a number of different minerals, the most important of which is stibnite. antimony is often called a semi-metal because in pure form it is not shiny and malleable like true metals. uses: automotive batteries
compounds and hydrated aluminum oxide are substitutes as flame retardants. chromium, tin, titanium, zinc, and zirconium compounds substitute for antimony chemicals in enamels, paint, and pigments. combinations of calcium, copper, selenium, sulfur, and tin are substitutes for alloys in lead-acid batteries...
https://www.cia.gov/library/publications/the-world-factbook/appendix/appendix-h.html