The average abundance of scandium in the crust is 36 ′ 10-4%, which is equivalent to the abundance of beryllium, boron, strontium, tin, germanium, arsenic, selenium and tungsten, but its distribution is extremely dispersed, and it is a typical scattered lithophile element. It is known that there are more than 800 kinds of scandium bearing minerals, but as independent minerals of scandium, there are only a few kinds of scandium yttrium ore, scandium phosphate ore, scandium silicate ore and titanium silicic acid rare gold ore, and the ore source is small, which is rare in nature.
At present, the reserves of scandium in the world are about 2000kt, of which 90~95% occur in bauxite, phosphorite and ferrotitanium ores, and a small part in uranium, thorium, tungsten and rare earth ores [49], mainly distributed in Russia, China, Tajikistan, the United States, Madagascar, Norway and other countries. CIS countries have systematically studied various types of associated scandium deposits, and believe that sedimentary bauxite (Sc) deposits, weathering leaching rare earth phosphate rock (Sc) deposits related to alkaline ultrabasic rocks, and some iron titanium (Sc) deposits are the most important deposit types, which are the main source of scandium.
1. Scandium is a chemical element with the symbol Sc and atomic number 21.
2. The simple substance is a soft, silvery white transition metal, often mixed with gadolinium, erbium, etc., with little output, and its content in the crust is about 0.0005%.
3. Scandium is often used to make special glass and light heat-resistant alloy.
