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Two new strontium gallium nitrides were obtained as single crystals by reaction in molten Na. Black Sr(3)GaN(3) is isostructural with its transition metal analogues, Sr(3)MnN(3), Ba(3)MnN(3), Sr(3)CrN(3), Ba(3)CrN(3), and Ba(3)FeN(3), and is the first example of a 313-ternary nitride containing only main group metals. It crystallizes in space group P6(3)/m (No. 176) with a = 7.584(2) A, c = 5.410(3) A, and Z = 2. Black Sr(6)GaN(5) is isostructural with Ca(6)GaN(5) and also with its transition metal analogues, Ca(6)MnN(5) and Ca(6)FeN(5). It crystallizes in space group P6(3)/mcm (No. 193) with a = 6.6667(6) A, c = 12.9999(17) A, and Z = 2. Both Ga compounds contain isolated planar [GaN(3)](6)(-) nitridometallate anions of D(3)(h)() symmetry.

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