The chemiluminescence which results when hydrogen telluride and fluorine are intimately mixed corresponds to an emission spectrum in the region 3900–5200 Å which appears to result from the previously unobserved TeF radical. The structure of the vibronic bands arising from transitions between 2Πi states has been assigned by analogy with the similar SF spectrum. The spectra corresponding to the A2Π3/2–X2Π3/2 and A2Π1/2–X2Π1/2 band systems appear to be well fit using the electronic and vibrational parameters T0(3/2–3/2) = 21 218 cm−1, T0(1/2–1/2) = 21 612 cm−1, we′ = 399 cm−1, wexe′ = 2.4 cm−1, we″ = 603 cm−1, and wexe″ = 4.0 cm−1. The difference in spin orbit constants for the ground and excited states is calculated to be 394 cm−1.