caa a22 4500 463189272 CHVBK 20180406164904.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10973-007-7751-2 doi (NATIONALLICENCE)springer-10.1007/s10973-007-7751-2 Thermal evolution of a slate [Elektronische Daten] [P. Sánchez-Soto, A. Ruiz-Conde, R. Bono, M. Raigón, E. Garzón] The thermal evolution of a slate rock sample (Berja, Almería, Spain) has been studied. The phase minerals identified in this sample were mica (illite), chlorite (clinochlore) and quartz as major components, with minor microcline, iron oxide and a mixed-layer or interstratified phase (montmorillonite-chlorite). This slate is highly silico-aluminous (48.33 mass% silica, 22.04 mass% alumina), and ca. 20 mass% of other elements, mainly Fe2O3 (8.35 mass%), alkaline-earths and alkaline oxides. Two main endothermic DTA effects, centered at 640 and 730°C, were observed. The more important contribution of total mass loss (7.15 mass%) was found between 500-900°C, with two DTG peaks detected at 630 and 725°C. All these effects were associated to the dehydroxylation of structural OH groups of 2:1 layered silicates mixed in the slate. The dehydroxylation of the layered silicates evidenced by dilatometry, produced a rapid increase of expansion between 600-800°C. The thermal evolution of the slate upper 800°C indicated the first sintering effects associated to shrinkage, which is also favoured by its low particle size (average 23 μm) and the presence of a liquid or vitreous phase as increasing the heating temperature. The application of thermal diffractometry to the slate sample allowed to study the formation of dehydroxylated crystalline phases from the layered silicates after heating. At 1000°C, β-quartz, dehydroxylated illite, iron oxide, relicts of microcline and the vitreous phase were present in the sample. All these results are interesting to know the thermal behaviour of a complex mineral mixture as identified in the slate. Springer Science+Business Media LLC, 2007 chlorite nationallicence dehydroxylation nationallicence dilatometry nationallicence DTA-TG nationallicence illite nationallicence interstratified phase nationallicence slate nationallicence thermal diffractometry nationallicence Sánchez-Soto P. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (CSIC) — Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain aut Ruiz-Conde A. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (CSIC) — Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain aut Bono R. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (CSIC) — Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain aut Raigón M. Departamento de Ingeniería Mecánica y de los Materiales, Escuela Superior de Ingenieros, Universidad de Sevilla, 41092, Sevilla, Spain aut Garzón E. Departamento de Ingeniería Rural, Universidad de Almería, La Cańada de San Urbano, 04120, Almería, Spain aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 133-141 1388-6150 90:1<133 2007 90 10973 https://doi.org/10.1007/s10973-007-7751-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-007-7751-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sánchez-Soto P. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (CSIC) — Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain aut NATIONALLICENCE 700 1- Ruiz-Conde A. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (CSIC) — Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain aut NATIONALLICENCE 700 1- Bono R. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (CSIC) — Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, 41092, Sevilla, Spain aut NATIONALLICENCE 700 1- Raigón M. Departamento de Ingeniería Mecánica y de los Materiales, Escuela Superior de Ingenieros, Universidad de Sevilla, 41092, Sevilla, Spain aut NATIONALLICENCE 700 1- Garzón E. Departamento de Ingeniería Rural, Universidad de Almería, La Cańada de San Urbano, 04120, Almería, Spain aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 133-141 1388-6150 90:1<133 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer