Results 11 to 20 of about 99,379 (196)
Oxidative Phosphorus Chemistry Perturbed by Minerals [PDF]
Life, 2022 Life is a complex, open chemical system that must be supported with energy inputs. If one fathoms how simple early life must have been, the complexity of modern-day life is staggering by comparison. A minimally complex system that could plausibly provide pyrophosphates for early life could be the oxidation of reduced phosphorus sources such as ...
Arthur Omran +3 more
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Structure and properties of lithium niobate ceramics produced from the batch of various genesis [PDF]
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2017 The paper compares the structure, mechanical and electrical properties of ceramics obtained on the basis of highly disperse monophasic lithium niobate powders synthesized by various ways.
M.N. Palatnikov +5 more
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Extraction of Rare Earth Metals by Solid-Phase Extractants from Phosphoric Acid Solution
Metals, 2021 Nowadays, solving the problem of rational, integrated use of the mined raw materials, the transition to waste-free technologies for its processing is a crucial task.
Olga Cheremisina +4 more
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Phosphorus mineral evolution and prebiotic chemistry: from minerals to microbes [PDF]
Earth-Science Reviews, 2021 Minerals are known to control the availability of non-volatile and bio-essential elements at Earth’s surface, e.g., phosphorus (P). Therefore, the role of minerals in prebiotic chemistry is a focal point of research into the origins of life. However, the mineralogical diversity of earliest Earth is not definitively known.
Craig Walton +9 more
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Scientific Reports, 2021 Syntheses of Nd2Fe14B magnetic powder by conventional method is a complicated multi-step process, which produces harmful pollutants and consumes a huge amount of energy and resources. Herein we report a simple chemical route for the preparation of (Nd–Pr)
Syed Kamran Haider +4 more
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Chemistry and Mineral Chemistry of Zircon in Alkaline Granites, South Sinal, Egypt [PDF]
Delta Journal of Science, 2010 Such geochemical investigations of alkaline granites as both Wadi Sieh and Wadi Lethi, south Sinai, Egypt, indicate that they are A-type granites. They are similar in major and trace elements but differ in rare earth elements (REE).
M.S. Azab +3 more
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Anais da Academia Brasileira de Ciências, 2007 Gahnite electron probe microanalyses from three pegmatites (Mirador, Capoeira and Quintos) of the Borborema Pegmatitic Province in northeastern Brazil allowed to determine molar compositions ranging from 86.22 to 95.41 mol% gahnite (ZnAl2O4), 1.51 to 6 ...
Dwight R. Soares +3 more
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dragon: A New Tool for Exploring Redox Evolution Preserved in the Mineral Record
Frontiers in Earth Science, 2020 The flow of energy and elements between the geosphere and biosphere can be traced through changing redox chemistry of Earth’s surface. Deep-time trends in the mineral record, including mineral age and elemental composition, reveal a dynamic history of ...
Stephanie J. Spielman, Eli K. Moore
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Ti-Fe mineralization in Bafq anomaly no. 15, Central Iran: Insights to mineralogy and mineral chemistry [PDF]
پترولوژی, 2021 The Ti- Fe mineralization in Bafq 15 anomaly located 35 Km NW of Bafq city, and is a part of Poshte Badam Block in the Central Iran. Mineralization including magnetite, titanomagnetite, ilmenite, and minor pyrite which hosted by gabbro and pyroxenite ...
Sakine Amraei +4 more
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Mineral chemistry and thermobarometry of gabbroic rocks from the Pargeh area (NE Qazvin): A key for understanding the crystallization conditions [PDF]
پترولوژیIntroduction Mineral chemistry data as well as petrography provide a comprehensive picture of magma crystallization conditions that support the conclusions based on geochemical data. In addition, the chemical composition of minerals such as clinopyroxene,
Nahid Naseri +4 more
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