Results 1 to 10 of about 151 (127)
The Low‐Temperature Besnus Magnetic Transition: Signals Due to Monoclinic and Hexagonal Pyrrhotite [PDF]
Geochemistry, Geophysics, Geosystems, 2018 The low‐temperature magnetic properties of the many pyrrhotite varieties have not been studied extensively. Monoclinic pyrrhotite (Fe7S8) goes through the Besnus transition at ~30–34 K, which is used widely to diagnose its presence in bulk samples. Other
Andrew P Roberts, Chorng-Shern Horng
exaly +4 more sources
International Journal of Mining Science and TechnologyThe electrochemical interaction between galena and monoclinic pyrrhotite was investigated to examine its impact on the physical and chemical properties of the mineral micro-surface.
Huashan Yan, Tingsheng Qiu
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Bulletin of the Geological Society of Finland, 1986 Recent literature has produced much information on the thermal and compositional stability and on the natural occurrences and mineral associations of monoclinic pyrrhotite.
G. Kullerud
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On the Magnetism Behind the Besnus Transition in Monoclinic Pyrrhotite [PDF]
Journal of Geophysical Research: Solid Earth, 2018 AbstractIn monoclinic 4C pyrrhotite (ideal formula Fe7S8), ordered vacancy distribution forms a superstructure with strong ferrimagnetism that makes this mineral a major remanent magnetization carrier in the Earth's crust. The pronounced decrease in isothermal remanence magnetization at about 32 K, known as Besnus transition, is a characteristic trait ...
Güven Kurtuldu +2 more
exaly +5 more sources
Preparation of Monoclinic Pyrrhotite by Thermal Decomposition of Jarosite Residues and Its Heavy Metal Removal Performance [PDF]
Minerals (Basel, Switzerland), 2021 Jarosite residues produced by zinc hydrometallurgical processing are hazardous solid wastes. In this study, monoclinic pyrrhotite (M-Po) was prepared by the pyrolysis of jarosite residues in H2S atmosphere. The influence of gas speed, reaction temperature, and time was considered.
Tianhu Chen, Hanlin Wang, Yuefei Zhou
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THE LOW TEMPERATURE TRANSITION IN MONOCLINIC PYRRHOTITE [PDF]
Journal De Physique Colloque, 1988 It is confirmed by new magnetization measurements that a magnetic transition occurs sharply at 30 K in the monoclinic pyrrhotite Fe7S8. Though its nature is not yet fully understood, this transition shows some similarities with the Verwey transition and can provide a powerful tool for the identification of pyrrhotite in rocks.
Pierre Rochette, G Fillion
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Geophysical Research LettersThe Yingxiu–Beichuan Fault Zone (YBFZ), located in the Longmen Shan Thrust Belt (LSTB) on the eastern Tibetan Plateau, is highly seismically active. However, direct evidence of large earthquakes at depth is scarce.
Lei Zhang +7 more
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Ferrimagnetic Structure of 3C Pyrrhotite (Fe7S8) From Neutron Diffraction
Geochemistry, Geophysics, GeosystemsPyrrhotite is a paleomagnetically important magnetic mineral in many geological settings. It forms numerous polytypes with different stacking patterns of the NiAs structure along the crystallographic c axis to produce different vacancy‐ordered ...
Chin‐Wei Wang +2 more
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Geophysical Research LettersThe Xianshuihe fault zone (XSHF) in southwestern China accommodates both aseismic creep and seismic slip, yet geological evidence constraining these processes remains limited.
Lei Zhang +6 more
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Micromagnetic Constraints on the Grain Size Dependence and Magnetic Stability of Sub‐Micron Monoclinic Pyrrhotite (Fe 7 S 8 ) [PDF]
Journal of Geophysical Research: Solid EarthAbstract We present the first micromagnetic simulations for sub‐micron monoclinic 4C pyrrhotite (), a common mineral in rocks and sediments and an important mineral in paleomagnetic studies. Previous experimental studies on the magnetic properties of pyrrhotite had limited control over granulometry and focused primarily on larger ...
Wyn Williams +6 more
openaire +2 more sources