2026-06-28T10:36:49Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/236922023-08-28T07:44:19Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Súarez Barrios, Mercedes author García Rivas, Javier author García Romero, Emilia author Jara, N. 2023-06-18T05:58:53Z 2023-06-18T05:58:53Z 2016-06 0169-1317 10.1016/j.clay.2015.12.032 016 https://hdl.handle.net/20.500.14352/23692 https://www.sciencedirect.com/journal/applied-clay-science/vol/126/suppl/C http://www.elsevier.com/locate/clay Sepiolite is one of the most important industrial minerals, due primarily to its surface properties related to its structure. Sepiolite contains alternating 2:1 polysomes that produce tunnels at the inner part of the fibre and channels at the edge of the fibre. Sepiolite is a mineral with notably wide variations in the crystal-chemistry, crystallinity and texture, depending on the formation conditions, which results in highly different characteristics and properties. In this work, six sepiolite samples from the Polatli area (Turkey) are studied, comparing their mineralogical and textural features. The mineralogical composition of the samples is similar: carbonates constitute the main impurities, dolomite appears in all samples studied in different proportions, and small amounts of calcite, quartz and palygorskite have been identified. There is a variation in almost all the reflections of sepiolite, the 110 d-spacing ranges between 12.31 Å and 12.05 Å, this variation is related to the crystal-chemistry of the mineral. The impurities are clearly identified in the IR spectra, in which in addition to the carbonates the presence of the palygorskite polysomes is also detected by the band located at ~ 3620 cm− 1. The differences in the surface properties found in this study (specific surface area between 122 m2 g− 1 and 376 m2 g− 1 and microporous area between 55 m2 g− 1 and 168 m2 g− 1) cannot be related only with the content in impurities, but with the texture and the possible presence of intergrowths. eng Mineralogical characterisation and surface properties of sepiolite from Polatli (Turkey) journal article URL https://docta.ucm.es/bitstreams/5a7fba05-517a-46d0-bdc7-969feafb3c84/download File MD5 0dadb4296aefb589b60b4ceba1b47b4a 1278257 application/pdf Mineralogical characterisation and surface.pdf URL https://docta.ucm.es/bitstreams/65601e9b-5329-44a5-876b-8b9a122e3f97/download File MD5 f4f4bc0090f332a236c1b8128fccf0cf 41366 text/plain Mineralogical characterisation and surface.pdf.txt