Diamond and diamond simulants as studied by micro-Raman spectroscopy

The ability of Raman and micro-Raman spectroscopies in the characterization and structural studies of diamond and novel diamond materials and films is presented. Correlations between Raman spectra and structure have been established and illustrated with natural diamond, graphite, carbon, novel brilliants and artificial ultrahard substances. Diamond-like films are well individualized and characterized by a Raman band at 1540±20 cm−1 which differs from those of graphite and amorphous carbon. A new structure, named “diamite” or “bridged graphite” having interlayer bonds is proposed for diamond-like material. A mechanism of destruction of ultrahard coatings is also suggested.