Mineralogía y microestructura de la pizarra de techar: comportamiento termoóptico y fisibilidad

摘要: The mineralogy and microstructure, which affect the slaty cleavage, are linked with strong preferred orientation of phyllosilicates this enables rock to be split into large, thin, flat sheets. Roofing slate samples different commercial fissilities have been analyzed by radioluminescence (RL), thermoluminescence (3DTL), X-ray diffraction (XRD), scanning electron microscopy (SEM) using back-scattered mode (BSEI) microprobe (EMP). They made up white micas, chlorite, quartz, detrital feldspars, ilmenite, pyrite, rutile apatite tourmaline. Texturally, all consist silt-sized clasts chlorite-mica stacks, muscovite ilmenite in a recrystalline, lepidoblastic matrix micas chlorite quartz lenses, showing very orientation. luminescence emission centers low broad blue band around 400 nm spectra positions alkali losses formation [AlO 4 ]o defects; peak at 473 interpreted as first thermal step (150-300oC) non-isothermal dehydroxylation phyllosilicates; 568 agrees Mn 2+ point defects aluminosilicate lattices. studies on cleavage could significant because Spain is largest producer roofing tiles world (87% production).