Results 51 to 60 of about 18,694 (284)
ESTIMATION OF SULPHUR IN PYRITES. [PDF]
Journal of the American Chemical Society, 1895 n ...
openaire +2 more sources
Microbiology Indonesia, 2020 Given the low-cost and eco-friendly method, biotechnology has been widely utilized in industries as an alternative for physical and chemical processes, including in the biomining process (e.g., bioflotation and biobeneficiation).
Edy Sanwani +5 more
doaj +1 more source
Theoretical study of topological properties of ferromagnetic pyrite CoS$_2$ [PDF]
, 2021 Since the discovery of the first topological material 15 years ago, the search for material realizations of novel topological phases has become the driving force of the field. While oftentimes we search for new materials, we forget that well established materials can also display very interesting topological properties. In this work, we revisit CoS$_2$
arxiv +1 more source
Geobiology, Volume 21, Issue 1, Page 28-43, January 2023., 2023 Abstract Manganese (Mn) oxidation in marine environments requires oxygen (O2) or other reactive oxygen species in the water column, and widespread Mn oxide deposition in ancient sedimentary rocks has long been used as a proxy for oxidation. The oxygenation of Earth's atmosphere and oceans across the Archean‐Proterozoic boundary are associated with ...
Sam C. Spinks +7 more
wiley +1 more source
Extremely large magnetoresistance in a topological semimetal candidate pyrite PtBi2 [PDF]
Phys. Rev. Lett. 118, 256601 (2017), 2016 While pyrite-type PtBi2 with face-centered cubic structure has been predicted to be a three-dimensional (3D) Dirac semimetal, experimental study on its physical properties remains absent. Here we report the angular-dependent magnetoresistance (MR) measurements of PtBi2 single-crystal under high magnetic fields.
arxiv +1 more source
THE DETERMINATION OF SULPHUR IN PYRITES. [PDF]
Journal of the American Chemical Society, 1895 n ...
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Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2023 Two examples of contact twins in pyrite from Peru are described. The first one, from Pasto Bueno ore deposit, shows the pyritohedron {120} as principal form, accompanied by the {111} octahedron and {100} cube as secondary forms, giving a lenticular aspect.
Moëlo, Yves +2 more
openaire +3 more sources
A review of microbial‐environmental interactions recorded in Proterozoic carbonate‐hosted chert
Geobiology, Volume 21, Issue 1, Page 3-27, January 2023., 2023 Abstract The record of life during the Proterozoic is preserved by several different lithologies, but two in particular are linked both spatially and temporally: chert and carbonate. These lithologies capture a snapshot of dominantly peritidal environments during the Proterozoic. Early diagenetic chert preserves some of the most exceptional Proterozoic
Kelsey R. Moore +5 more
wiley +1 more source
DFT Study into the Influence of Carbon Material on the Hydrophobicity of a Coal Pyrite Surface
Molecules, 2019 From the macroscopic point of view, the hydrophilicity of symbiotic carbon pyrite is weakened overall compared to that of pure pyrite. It is very important to explain the impact of elemental carbon accreted on a pyrite surface on the surface’s ...
Peng Xi +3 more
doaj +1 more source
Fermi Surface and Carriers Compensation of pyrite-type PtBi$_{2}$ Revealed by Quantum Oscillations [PDF]
Phys. Rev. B 98, 085137 (2018), 2018 Large non-saturating magnetoresistance has been observed in various materials and electron-hole compensation has been regarded as one of the main mechanisms. Here we present a detailed study of the angle-dependent Shubnikov -de Haas effect on large magnetoresistance material pyrite-type PtBi$_{2}$, which allows us to experimentally reconstruct its ...
arxiv +1 more source