Seven Spanish coals from lignite to semi-anthracite have been characterised by Mossbauer spectroscopy (MS) at room temperature (RT) and 80 K. The aromaticities as obtained from Fourier transform infrared spectroscopy (FTIR) varied from 0.44 to 0.96. From the analysis of the Mossbauer spectra the iron bearing minerals were found to be mainly pyrite and sulphates in ail the samples. Jarosite was only found to be present in lignite, brown and sub-bituminous coal. However, iron carbonates, mainly as siderite were only detected in the bituminous and semi-anthracite that have higher aromaticities (0.71, 0.95 and 0.96).