الفهرس 
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Abstract
In the Eastern Desert of Egypt, Rare -Metal Mineralization May be associated with alkaline ,biotite/muscovite alkali feldspar granite, the alkaline granite is peralkaline in nature ,while the alkali feldspare granite and albite granite have metaluminous to peraluminous nature. in the present study , we have studied the metaluminous to peraluminous rare- metal Granites from two different localities in the Central Eastern Desert of Egypt.the first locality represents the biotite hypersolvus alkali feldspar granite of Homrit Waggat and the other is the albite granite from Nuweibi and abudabbab.