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GaP (Gallium Phosphide) is a orange-yellow semi-translucent material, which is made by direct reaction of galliium and phosphide or reaction by oxide gallium and phosphide at temperature of 900~1000C.

Specific gravity is 4.13,melt point is 1465C, dielectric constant is 9.1,energy range is 2.2eV. GaP has the semiconductor charecteristics as other III-V compounds materials therefore can be used for display elements of various visible light emmition diode as well as illumination (yellow and green) of mobile phone.