Abstract：Ammonium-illite is the isomorphism of the illite，in which the K+was substituted by the NH+4. The X-ray diffraction，fourier infrared spectrum and TGA-DSC combined with fourier infrared spectrum were used to study the minerals in No.15 coal seam from Jincheng and Yangquan districts of Shanxi Province.It was found that the main clay minerals in the coal partings and the coal ashes under low temperature were ammonium-illite and kaolinite，with 21％～74％ ammnioum-illite. The X-ray diffraction peak of d(001)=1.026～1.032 nm and the absorption peak of 1428.37～1431.99 cm-1 in infrared spectrum，are two important characteristics to distinguish the ammonium-illite from other clay minerals.The results of TGA-DSC combined with fourier infrared spectrum indicated that the deammonification temperature was between 450 ℃ and 700 ℃，and the crystal destruction and ammonium-releasing reach maximum at the temperature of 559 ℃.It was found that the ammonium had kaolinite illusion，indicating that the ammonium-illite was transformed from kaolinite under the NH+4-rich and K+-poor environment in diagenesis.
. Mineralogy and origin of ammonium-illite of the Carboniferous Taiyuan Formation in Jincheng and Yangquan districts of Shanxi Province[J]. JOPC, 2011, 13(5): 501-508.
梁绍暹，刘钦甫，于常亮，等.2005.华北石炭二叠纪聚煤区西部含铵伊利石—黏土岩夹矸的研究［J］.河北建筑科技学院学报，22(4):59-65. 梁绍暹.1996.阳泉三矿3#和12#煤层黏土岩夹矸物质组成的再研究［J］.山西矿业学院学报，14(4):313-320. 刘钦甫，张鹏飞，丁述理.1996.华北石炭二叠纪含煤地层中的铵伊利石［J］.科学通报，41(8):717-719. 刘钦甫，张鹏飞.1997.华北晚古生代煤系高岭岩物质组成和成矿机理研究［M］.北京:海洋出版社，39-42. 罗泰义，高振敏.1994a.固定铵的矿物学研究［J］.矿物学报，14(4):404-407. 罗泰义，高振敏.1994b.岩矿中固定铵的化学分析［J］.科学通报，39(1):54-57. 罗泰义，高振敏.1995.岩矿中固定铵的岩石地球化学研究［J］.矿物学报，15(3):328-331. 罗泰义，高振敏.1996.成矿流体中铵(氨)的地球化学意义［J］.地质地球化学，2:98-102. Higashi S.1982.Tobelite，a new ammonium dicotahedral minca［J］. Mineralogical Journal，3:138-146. Juster T C，Brown N P E，Bailey S W.1987.NH4-bearing illite in very low grade metamorphic rocks assoiated with coal，northeastern Pennsylvania［J］.American Mineralogist，72(5，6):555-565. Sucha V，Elsass F，Eberld D l.1998.Hydrothermal synthesis of ammonium illite［J］.American Mineralogist，83(1，2):58-67. Williams L B，Wilcoxon B R，Ferrell R E， et al.1992.Diagenesis of ammonium during hydrocarbon maturation and migration，Wilcox Group，Louisiana，USA［J］.Appl.Geochem.，7: 123-134. Wilson P N，Parry W T，Nash W P.1992.Characterization of hydrothermal tobelitic veins from black shale，Oquirrh Mountains，Utah［J］.Clays and Clay Minerals，40：405-420.
