Results 1 to 10 of about 3,487,130 (296)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
The Mineral Chemistry Networks of Tin and Tungsten Reflect Metallogenic Events of the Mesozoic
GeosciencesContinental remobilization is a crucial driver of metallogenesis and the formation of ore deposits. Some of the world’s largest mineral deposits of the economically valuable elements tin (Sn), tungsten (W), gold (Au), copper (Cu), lead (Pb), and zinc (Zn)
Eli K. Moore +2 more
doaj +1 more source
Metals, 2020 The kinetic features of solvent and solid-phase extraction of yttrium and iron (III) from simulated and industrial phosphoric acid solutions are revealed.
Olga Cheremisina +4 more
doaj +1 more source