111627 20240822135943.0 doi 10.1007/s00269-021-01134-w sideral 123843 ART-2021-123843 eng Alte da Veiga, Nuno M.S. Physico-chemical study of an exogenic fulgurite from a thunderstorm on 10th August 2013 in Dallas, TX 2021 Access copy available to the general public Unrestricted Droplet-like exogenic fulgurites comprise a minor grouplet of natural glasses resulting from powerful lightning strikes. Reports on such type-V fulgurites are scarce in the literature. In this work, a fulgurite specimen from the thunderstorm that took place on 10th August 2013, in Dallas, TX, USA, has been analyzed using X-ray powder diffraction, X-ray fluorescence, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and infrared and Raman spectroscopy techniques. X-ray diffraction revealed the amorphous nature of the exofulgurite, and X-ray fluorescence showed a high Si, Al and Ca content. Infrared and Raman spectroscopy were key in revealing clear Si–O modes related signatures and a very significant presence of water (OH/H2O). A parallel with glassy silicate materials, but also with opal-A, was essential in the understanding of the fulgurite’s characteristics. In particular, Raman data evidenced the exofulgurite to have a high degree of depolymerization. info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.748 2021 MINERALOGY 19 / 30 = 0.633 2021 Q3 T2 MATERIALS SCIENCE, MULTIDISCIPLINARY 278 / 344 = 0.808 2021 Q4 T3 0.596 2021 Materials Science (miscellaneous) 2021 Q2 Geochemistry and Petrology 2021 Q2 3.5 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Martín Gil, Francisco J. Martín Gil, Jesús Carvalho Gomes, Elsa María Martín Ramos, Pablo Universidad de Zaragoza (orcid)0000-0003-2713-2786 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 48 (2021), 12 [15 pp.] Phys. chem. miner. PHYSICS AND CHEMISTRY OF MINERALS 0342-1791 639939 http://zaguan.unizar.es/record/111627/files/texto_completo.pdf Postprint 1333360 http://zaguan.unizar.es/record/111627/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:111627 articulos driver 2024-08-22-13:58:10 ARTICLE