Ammonium-illite smectite interlayer clay minerals in coal-bearing strata in Jincheng district of Shanxi Province
Abstract：X ray diffraction, fourier infrared spectrum and TGA-DSC combined with fourier infrared spectrum were used to study the mineralogical characteristics of the partings and floors of No. 9 coal in the areas of Jincheng in Shanxi Province. There are several important characteristics of ammoniumillite smectite interlayer including the sub-peak on the left of 1. 033 nm （d（001） of ammonium illite）higher than the right sub-peak, the IR absorption peaks from the distor- tion vibrtation of NH4 between 1 427.09 and 1 433.34 cm-1 and NH3 generated heated at the temperature of 561 ℃. Ammonium-illite smectite interlayer is hydrothermal altered clay minerals, generated from the illitization of illite smec- tite interlayers when K＋ is substituted by NH4＋ transformed from organic nitrogen in the condition of relatively high ma ture,and its formation temperature is about 350 ℃.
Keywords：Jinchengcoal-bearing strataammonium-illite smectite interlayerhydrothermal alteration
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 231-236 )