Open AccessQUANTITATIVE MINERAL MATTER DETERMINATION IN LIGNITES USING X-RAY DLFRACTOMETRY AND POSITION SENSITIVE DETECTOR (XRD-PSD)
Author(s) -
Σ. Παπαζησιμου,
Σ. Καλαϊτζίδης
Publication year - 2004
Publication title -
deltio tīs ellīnikīs geōlogikīs etaireias/deltio tīs ellīnikīs geōlogikīs etaireias
Language(s) - English
Resource type - Journals
eISSN - 2529-1718
pISSN - 0438-9557
DOI - 10.12681/bgsg.16737
Subject(s) - muscovite , mineral , mineralogy , diffractometer , quartz , analytical chemistry (journal) , illite , correlation coefficient , diffraction , clay minerals , geology , materials science , chemistry , crystallography , physics , optics , crystal structure , metallurgy , mathematics , statistics , chromatography
Thirty lignite samples from western Péloponnèse (Greece) were examined in the Department of Mineralogy, Natural History Museum, London, using an X-Ray Diffractometer equipped with a Position Sensitive Detector (Enraf-Nonius PSD 120). Diffraction patterns acquisition time was only 5 min with the minimum interference of the organic matter. Qualitative and quantitative evaluation of the mineral matter present performed using GUFI5 Enraf-Nonius software and involved a pattern-fit stripping technique. The prevailing minerals in all the studied samples are the mixed layers of illite/smectite, quartz, muscovite and K-feldspars. The weight percentages of the mineral matter as it was calculated from the diffraction patterns display high correlation coefficient (>0.85) with the respective wt.-% of ash in 750°C for most of the samples. The low correlation coefficient (0.65) of some samples may be attributed to the very small size of the mineral crystalline particles and/or the presence of inorganic amorphous phases.