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The dissociative recombination rate coefficient for CF + 3 has been measured at 300 K using a flowing afterglow Langmuir probe-mass spectrometer (FALP-MS) apparatus. A value of (2.8 ± 0.8) × 10 −7 cm 3 s −1 has been found. This is about a factor of 3 less than values for this reaction, commonly used in plasma models.