[Study on the micro-FTIR and Raman spectra of the alluvial diamonds from yangtze craton and their geological significances].

The FTIR and Raman spectra of 10 diamonds from Yuanshui, Hunan province show that the alluvial diamonds from this area are mostly IaAB type, with a significant character that the A-center is enriched relatively; the nitrogen concentration in the diamonds is between 38.20 and 840.67 microg x g(-1), which has a tremendous distinction in different crystal.