21. It is the primary source of scandium . 22. The company takes its name from scandium , the 21st golf clubs and fishing rods. 23. He farms out the scandium -aluminum welding to Grand Prairie experts who build jet fighters. 24. Three group 3 elements occur naturally, scandium , yttrium, and either lanthanum or lutetium. 25. Metallic scandium is produced industrially by the scandium fluoride followed by a reduction with metallic calcium. 26. Metallic scandium is produced industrially by the scandium fluoride followed by a reduction with metallic calcium. 27. Occurs in miarolitic cavities in granite, in alpine veins and in scandium bearing granitic pegmatites. 28. Varying the amount of hydrogen controls qualities such as the hardness of the resulting scandium hydride. 29. Particularly promising is the strengthening of aluminium alloys with as little as 0.5 % scandium . 30. About 80 kg of scandium is used in metal halide lamps / light bulbs globally per year.
