Results 21 to 30 of about 18,694 (284)
Journal of Raman Spectroscopy, Volume 54, Issue 1, Page 84-92, January 2023., 2023 This work presents thermal conductivity and Raman mode anharmonicity of single crystalline CVT‐grown (1–3 mm) and natural FeS2 samples by applying optothermal Raman (OTR) technique. Big thermal conductivity difference at 100 K between synthetic and mineral samples arising as a result of different defect concentrations is captured successfully by OTR ...
Ayberk Özden +4 more
wiley +1 more source
Chalcopyrite Dissolution at 650 mV and 750 mV in the Presence of Pyrite
Metals, 2015 The dissolution of chalcopyrite in association with pyrite in mine waste results in the severe environmental issue of acid and metalliferous drainage (AMD).
Yubiao Li +3 more
doaj +1 more source
Enhanced thermoelectric properties by Ir doping of PtSb2 with pyrite structure [PDF]
Appl. Phys. Lett. 100, 252104 (2012), 2012 The effects of Ir doping on the thermoelectric properties of Pt1-xIrxSb2 (x = 0, 0.01, 0.03, and 0.1) with pyrite structure were studied. Measurements of electrical resistivity rho, Seebeck coefficient S, and thermal conductivity kappa were conducted.
arxiv +1 more source
Tropical surface gold mining: A review of ecological impacts and restoration strategies
Land Degradation &Development, Volume 33, Issue 18, Page 3661-3674, December 2022., 2022 Abstract Surface gold mining severely degrades landscapes, causing deforestation, soil erosion and displacement, and toxic contamination. The prevalence of both large‐scale and artisanal, small‐scale surface gold mining in the tropics has risen over recent decades.
Shrabya Timsina +6 more
wiley +1 more source
Thermal Behavior of Pyrite in the CO2 and N2 Atmosphere for Obtaining Pyrrhotite: A Magnetic Material [PDF]
Materials Research, 2018 In the southern of Brazil the coal is composed of a large amount of pyrite (FeS2), an environmental problem for this region because the pyrite turns a waste.
Eunice Machado de Oliveira +4 more
doaj +1 more source
Prebiotic Interconversion of Pyruvate and Lactate over Zeolite‐Supported Ni Catalyst
Angewandte Chemie, EarlyView.Synthetic zeolite Y‐supported Ni mineral can catalyze the interconversion of metabolically crucial pyruvate and lactate under hydrothermal vent conditions, which could pave the way for the modern biological process by lactate dehydrogenase and nicotinamide adenine dinucleotide.
Youngdong Song +4 more
wiley +2 more sources