Cation diffusion is an important rate-limiting process in the growth of pyrrhotite (Fe1-xS) in passivating films on steels exposed to sulfidic environments, and for proposed synthetic applications of Fe1-xS, for example single-phase magnetic switching devices. Above the Néel temperature TN of 315 °C, where Fe1-xS is paramagnetic and structurally disordered, iron self-diffusivity *DFe predictabl...

Pyrrhotite-bearing aggregates are a major cause of internal sulphate attack (ISA) in concrete. The concentration pyrrhotite is usually too low to permit direct accurate quantification. Hence, safety restrictions put on expressed terms the total sulphur content. This paper outlines an analytical approach which froth flotation employed produce bulk sulphide concentrate amenable quantification pyr...

Studies of the element contents and isotopic characteristics sulfide minerals from seafloor hydrothermal deposits are a significant method investigating seawater-fluid mixing fluid-rock and/or sediment interactions in systems. The ores Noho field (NHF) Okinawa Trough (OT) consist pyrrhotite, isocubanite, sphalerite, galena, amorphous silica. Rh, Ag, Sb, Tl mostly increase galena as fluid temper...

We describe the structure and present situation of the Chinese healthcare system and discuss its primary problems and challenges. We discuss problems with inefficient burden sharing, adverse provider incentives and huge inequities, and seek explanations in the structural features of the Chinese healthcare system. The current situation will be further challenged in the future by an aging populat...

The eutectic mineral assemblage calcite-dolomitepericlase-apatite-forsterite-magnesioferrite-pyrrhotite-alabandite in a carbonatite dike within the Oka complex, Quebec, buffers the fugacities (and partial pressures) of all gas species in C-O-H-S-F, assuming vapor saturation. At the inferred eutectic (640 ~ C, 1 kbar), the most important gas species and their partial pressures (bars) were: H20, ...

[1] First-order reversal curve (FORC) diagrams have become a standard tool in rock magnetism, yet magnetite is the only magnetic mineral that is well characterized using FORC diagrams. We present FORC diagrams for predominantly single-domain (SD) synthetic aluminous hematite (a-Fe2-xAlxO3) and goethite (a-(FeAl)OOH) and natural greigite (Fe3S4) and pyrrhotite (Fe7S8) to constrain interpretation...