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Columbia University Press
magnalium
 (măgnā´lēsymbolm) , alloy of aluminum and about 5% magnesium. Although weak and soft in the elemental state, magnesium alloys with aluminum, manganese, zinc, tin, zirconium, and cerium to produce alloys useful in engineering materials. The strength and hardness of aluminum increases when it is alloyed with such substances as magnesium, manganese, nickel, chromium, zinc, iron, copper, and silicon. Magnalium–lighter and more workable than aluminum–is used in making metal mirrors and scientific instruments.