A5036354814- Geological and Geochemical Analysis
- Planetary Science and Exploration
- Astro and Planetary Science
- Geology and Paleoclimatology Research
- High-pressure geophysics and materials
- Recycling and utilization of industrial and municipal waste in materials production
- earthquake and tectonic studies
- Geological Modeling and Analysis
- Mineralogy and Gemology Studies
- Recycled Aggregate Concrete Performance
- Concrete and Cement Materials Research
- Nuclear materials and radiation effects
- Geological formations and processes
- Occupational and environmental lung diseases
- Laser-induced spectroscopy and plasma
- Earthquake Detection and Analysis
- Paleontology and Stratigraphy of Fossils
- Polymer Science and Applications
- Methane Hydrates and Related Phenomena
- Plasma Diagnostics and Applications
- Scientific Research and Discoveries
- Polymer Nanocomposites and Properties
- Community Development and Social Impact
- Tribology and Wear Analysis
University of Milano-Bicocca
2022-2024
University of Pisa
2018-2024
Center for Nanotechnology Innovation
2019-2020
Italian Institute of Technology
2019-2020
University of Glasgow
2019
Abstract We report the discovery of a unique micrometeorite, containing an exotic Al-Cu-Fe alloy composed two intermixed phases: khatyrkite (CuAl 2 ) and stolperite (CuAl) both minor Fe (<1.4 wt%). These phases are dendritic rapidly co-crystallized at binary system’s peritectic (~550 °C). The host micrometeorite is otherwise typical S-type micro-porphyritic cosmic spherule relict olivine (Fo76–90, Cr O 3 : 0.01–0.56 wt%, MnO: 0.03–0.32 wt% CaO: 0.09–0.22 wt%) cumulate layered texture....
The "asbestos problem" arises from the fact that asbestos is still abundant in many buildings and represents a hazard for human health. Current strategies adopted by law aiming at mitigating this are far being ideal. A smarter solution would be an energy sustainable detoxification treatment followed recycling. If adopted, it preserve environment pollution, natural resources depletion health hazard. Asbestos-cement slates were thermally deactivated through process reused mortar plaster...
Cement asbestos slates, commonly known as Eternit® and still abundant in private public buildings, were deactivated through a thermal process. The resulting cement powder (DCAP), mixture of Ca-Mg-Al silicates glass, was compounded with Pavatekno Gold 200 (PT) Pavafloor H200/E (PF), two different epoxy resins (bisphenol A epichlorohydrin) for flooring applications. addition the DCAP filler to PF samples causes slight but acceptable decrease relevant mechanical properties (compressive,...
Abstract TiO 2 II, a high‐pressure polymorph of titanium dioxide, is diagnostic indicator shock metamorphism in impact rocks. Due to its typical micro‐to‐nanometer scale, there are no ab initio structure solutions natural thereby generating uncertainty about crystal and known similarity with srilankite (Ti 0.67, Zr 0.33 )O . Nanoscale electron diffraction investigation II from the Australasian tektite strewn field provides first solution revealing primitive orthorhombic lattice cell...
Coesite, a high-pressure silica polymorph (pressure 3–10 GPa, temperature <3000 K), is diagnostic feature of shock metamorphism associated with impact cratering on quartz-bearing target rocks. It preserved as metastable phase in sedimentary rocks that experienced peak pressures excess ∼10 where it typically occurs intergranular polycrystalline aggregates microcrystals embedded glass known "symplectic regions." The presence coesite the symplectic regions experiencing conditions beyond limits...
Nakhlite meteorites are ~1.4 to 1.3 Ga old igneous rocks, aqueously altered on Mars ~630 Ma ago. We test the theory that water-rock interaction was impact driven. Electron backscatter diffraction demonstrates Miller Range 03346 and Lafayette were heterogeneously deformed, leading localized regions of brecciation, plastic deformation, mechanical twinning augite. Numerical modeling shows pattern deformation is consistent with shock-generated compressive tensile stresses. Mesostasis within...
Abstract Muong Nong-type (MN) tektites are a layered type of tektite associated to the Australasian strewn field, youngest (790 kyr) and largest on Earth. In some MN tektites, coesite is observed in association with relict quartz silica glass within inclusions surrounded by froth layer. The formation coesite-bearing frothy here investigated through 3D textural multiscale analysis vesicles contained sample, combined compositional spectroscopic data. vesicle size distribution testifies...
We searched late Miocene sedimentary rocks in an attempt to recover fossil micrometeorites derived from the Veritas asteroid family. This study was motivated by previous identification of a pronounced 3He peak (4-5x above background) within marine sediments with ages between ∼8.5-6.9 Ma ago (Montanari et al. 2017. GSA Bulletin, 129:1357-1376). processed 118.9 kg sediment Monte dei Corvi beach section (Italy), global type-section for Tortonian epoch (11.6-7.2 Ma). Samples were collected both...
Coesite, a high-pressure silica polymorph, is diagnostic indicator of impact cratering in quartz-bearing target rocks. The formation mechanism coesite during hypervelocity impacts has been debated since its discovery rocks the 1960s. Electron diffraction analysis coupled with scanning electron microscopy and Raman spectroscopy shocked grains from Australasian tektite/microtektite strewn field reveals fine-grained intergrowths plus quartz bearing planar deformation features (PDFs). Quartz...
Abstract We examined 16 white opaque inclusions exposed on two polished slices of a Muong Nong‐type Australasian tektite from Phin, Laos. The usually consist core, surrounded by froth layer, and quartz neoblast layer. cores are composed primarily mixture silica glass, coesite, in varying proportions. A thin (up to ~4 μm) layer SiO 2 ‐poor glass enriched FeO, MgO, CaO, Al O 3 , TiO is observed as bright halo backscattered electron images around the neoblasts places contains μm‐sized crystals,...
Coesite in impact rocks is traditionally considered a retrograde product formed during pressure release by the crystallisation of an amorphous phase (either silica melt or diaplectic glass). Recently, detailed microscopic and crystallographic study ejecta from Kamil crater Australasian tektite strewn field pointed turn to different coesite formation pathway, through subsolidus quartz-to-coesite transformation. We report here further evidence documenting directly quartz. In we found...
The “asbestos problem” arises from the fact that asbestos is still abundant in many buildings and represent a hazard for human health. Current strategies adopted by law aiming at mitigating this are far being ideal. A smarter solution would be an energy sustainable detoxification treatment followed recycling. If adopted, it preserve environment pollution, natural resources depletion health hazard. Asbestos-cement slates were thermally deactivated through process reused mortar plaster...
Electron crystallography have evolved in the last years into a technique able to furnish fast and reliable structural information from nanocrystals.3D electron diffraction (ED) methods provide data nm-sized domains, which are suitable for ab-initio structure solution.Moreover, it is now possible derive phase orientation map with nanometric resolution by recording sequence of ED patterns while scanning an area.Therefore, we access crystal topotactic relations between crystalline grains at...