ALUMINUM ALLOY WITH ADDITIONS OF COPPER, LITHIUM AND AT LEAST ONE ALKALI OR RARE EARTH METAL, AND

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An aluminum alloy including aluminum, about 1.8 to about 5.6 percent by weight copper, about 0.6 to about 2.6 percent by weight lithium, and at least one of lanthanum up to about 1.5 percent by weight, strontium up to about 1.5 percent by weight, cerium up to about 1.5 percent by weight and praseodymium up to about 1.5 percent by weight.