Two sets of amorphous carbon materials prepared at different routes are irradiated with swift (145 MeV) heavy ion (Ne⁶⁺). The structural parameters like the extent of local ordering along the c and a axis i.e., L_c and L_a, the average spacing of the crystallographic planes (002) i.e., d₀₀₂ and the fraction of the amorphous phase of the unirradiated and the irradiated samples are estimated by X-ray diffraction technique. The fraction of the amorphous phase is generally found to increase with the irradiation dose for both sets of the samples. The estimated d₀₀₂ values are found to be almost unaffected by irradiation but L_c and L_a are decreased slightly with irradiation. The estimated values of L_c and L_a corroborate with the increase of disorder in both sets of the samples with the increasing dose of irradiation.

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