Results 41 to 50 of about 17,002 (248)

CO₂ Adsorption Performance and Kinetics of Ionic Liquid-Modified Calcined Magnesite

Nanomaterials, 2021
CO2 is a major contributor to global warming, and considerable efforts have been undertaken to capture and utilise it. Herein, a nanomaterial based on ionic liquid (IL)–modified calcined magnesites was investigated for CO2 capture.
Na Yang, Rong Xue, Guibo Huang, Yunqian Ma, Junya Wang   +4 more
doaj   +1 more source

Six Ca‐Mg‐Fe Carbonate Reference Materials for In Situ Measurement of Oxygen and Carbon Isotope Ratios

Geostandards and Geoanalytical Research, EarlyView.
Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano, Chris Harris, Julie Luyt, Andreas Pack, Tommaso di Rocco, Torsten Vennemann, Franziska D.H. Wilke, Anja M. Schleicher, Johannes Glodny, Kimberly T. Tait, Simon Philippo   +10 more
wiley   +1 more source

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

Microstructures and properties of microporous magnesia aggregates from Mg(OH)2 and magnesite

Journal of Asian Ceramic Societies
Microporous MgO refractory aggregates were prepared with Mg(OH)2 and magnesite by the in-situ decomposition method, and the influence of magnesite content on the microstructures and properties of the aggregates was investigated.
Jinling Shi, Jianhua Nie, Wen Yan, Zheng Han, Xiao Wang, Yuanbing Li, Jinwen Song   +6 more
doaj   +1 more source

Nondestructive Raman investigation on wall paintings at Sala Vaccarini in Catania (Sicily) [PDF]

, 2016
In this work, the results of a Raman campaign for studying seventeenth-century Sicilian frescoes, by using two portable Raman systems, equipped with different excitation sources (785 and 1064 nm), are proposed.
Agostino, Giuseppe, Barone, Germana, Bersani, Danilo, Coccato, AlessiaUGent000120924543802001344494978617344402D8E287A8-22E5-11E2-9548-999410BDE39D, Lauwers, DebbieUGent00007023790280200125244797321788992206F29022-F0EE-11E1-A9DE-61C894A0A6B4, Manzini, Davide, Mazzoleni, Paolo, Neri, Nicola Francesco, Raneri, Simona, Vandenabeele, PetereditorLW02WE060019921959028010011081800000-0001-5285-9835F5162F6C-F0ED-11E1-A9DE-61C894A0A6B4, Vandenabeele, PeterLW02WE060019921959028010011081800000-0001-5285-9835F5162F6C-F0ED-11E1-A9DE-61C894A0A6B4   +10 more
core   +4 more sources

Apatite in Bennu samples indicates multiple stages of aqueous alteration

Meteoritics &Planetary Science, EarlyView.
Abstract Calcium phosphates are ubiquitous in planetary materials, including samples returned from asteroid Bennu by the OSIRIS‐REx mission. We characterized apatite [Ca5(PO4)3(F,Cl,OH)] grains in Bennu samples by scanning electron microscopy, electron microprobe analysis, and transmission electron microscopy to investigate their compositions, mineral ...
Laura B. Seifert, T. M. Erickson, L. P. Keller, J. J. Barnes, K. Thomas‐Keprta, L. Le, J. Gorce, Z. Rahman, T. J. Zega, H. C. Connolly Jr, D. S. Lauretta   +10 more
wiley   +1 more source

Geological characteristic of the talc deposit [PDF]

Acta Montanistica Slovaca, 1997
A deposit with magnesite - talc mineralisation was explored northerly of the Gemerská Poloma, Rožòava district, Slovakia, in the years 1988 - 1995. Magnesites in the gemericum unit are only sporadically accompanied by talc.
Kilík Ján
doaj  

European mineral statistics 2002-06 : a product of the World Mineral Statistics database [PDF]

, 2008
European Mineral Statistics has over 300 pages of tables on minerals production and trade. Thirty two countries are covered including all the EU members, EU applicants, Norway and Switzerland. In the first section there are tables by country, followed by
Bide, Tom, Brown, Teresa, Hannis, Sarah, Hetherington, Linda, Hobbs, Susan, Idoine, Naomi, Naden, Jonathan   +6 more
core  

Simultaneous precipitation of magnesite and lizardite from hydrothermal alteration of olivine under high-carbonate alkalinity [PDF]

, 2014
13 pagesInternational audienceThe present study reports original experiments in order to investigate the simultaneous serpentinization and carbonation of olivine with relevance in Earth systems (e.g.
Chiriac, Rodica, Findling, Nathaniel, Janots, Emilie, Lafay, Romain, Montes-Hernandez, German, Toche, Francois   +5 more
core   +3 more sources

X‐ray computed tomography study of terrestrial analog cores in preparation for Mars sample return

Meteoritics &Planetary Science, EarlyView.
Abstract Mars Sample Return (MSR) is expected to transform planetary science by providing unprecedented access to pristine Martian material. Initial characterization in the sample receiving facility (SRF) will rely on nondestructive techniques such as X‐ray computed tomography (XCT) to document the condition, distribution, and internal features of ...
Sophie Benaroya, Christopher D. K. Herd, David T. Flannery, Nicolas Randazzo   +3 more
wiley   +1 more source