Large, crack-free single crystals of AgGaTe2 were grown for the first time using the horizontal gradient freeze technique. As-grown samples were transparent from 1.2 mu m to beyond 16 mu m (the spectrometer limit): they exhibited near-theoretical transmission at long wavelengths, but in the near-infrared transmission was limited by scattering from second-phase precipitates (much like AgGaSe2 and AgGaS2). Dilatometer measurements on oriented single crystal revealed severely anisotropic thermal expansion similar in sign and magnitude to that of the sulfide and selenide analogs, Preliminary refractive index data suggests that the birefringence of AgGaTe2 may be slightly too small For phase-matched frequency conversion, but additional measurements over a broader wavelength range are required to refine the Sellmeier fits.