PETROGRAPHY AND APPLICATION OF THE RIETVELD METHOD TO THE QUANTITATIVE ANALYSIS OF PHASES OF NATURAL CLINKER GENERATED BY COAL SPONTANEOUS COMBUSTION

Earth sciences research journal

Quintero D., John Alexander¹  Candela H., Sol Angel²  Carreño P., Angélica María³  Ramos G., Miguel A.⁴  Henao M., José Antonio⁴  Pinilla A., Jesús Andelfo⁴  Ríos R., Carlos Alberto⁵ 

[1] Carbones del Cerrejón Limited, Bogotá, Colombia;ECOPETROL S.A., Colombia;ECOPETROL-Instituto Colombiano del Petróleo, Piedecuesta, Colombia;Universidad Industrial de Santander;Universidad Industrial de Santander, Bucaramanga, Colombia

关键词: Rietveld method;    Cerrejón;    X-ray powder diffraction;    natural clinker.;   

DOI  :  

学科分类：天文学(综合)

来源: Universidad Nacional de Colombia * Departamento de Geociencias

【 摘 要 】

Fine-grained and mainly reddish color, compact and slightly breccious and vesicular pyrometamorphic rocks (natural clinker) are associated to the spontaneous combustion of coal seams of the Cerrejón Formation exploited by Carbones del Cerrejón Limited in La Guajira Peninsula (Caribbean Region of Colombia). These rocks constitute remaining inorganic materials derived from claystones, mudstones and sandstones originally associated with the coal and are essentially a complex mixture of various amorphous and crystalline inorganic constituents. In this paper, a petrographic characterization of natural clinker, as well as the application of the X-ray diffraction (Rietveld method) by mean of quantitative analysis of its mineral phases were carried out. The RIQAS program was used for the refinement of X ray powder diffraction profiles, analyzing the importance of using the correct isostructural models for each of the existing phases, which were obtained from the Inorganic Crystal Structure Database (ICSD). The results obtained in this investigation show that the Rietveld method can be used as a powerful tool in the quantitative analysis of phases in polycrystalline samples, which has been a traditional problem in geology.

【 授权许可】

CC BY