High form of pentlandite and its thermal stability

@article{Sugaki1998HighFO,
  title={High form of pentlandite and its thermal stability},
  author={Asahiko Sugaki and Arashi Kitakaze},
  journal={American Mineralogist},
  year={1998},
  volume={83},
  pages={133 - 140}
}
Abstract The high-temperature form of pentlandite (Fe4.5Ni4.5S8) was found to be stable between 584 ± 3 and 865 ± 3 °C, breaking down into monosulfide solid solution and liquid at the later temperature. The phase is unquenchable and always displays the X-ray pattern of pentlandite (low form) at room temperature. High-temperature X-ray diffraction demonstrated that the high form has a primitive cubic cell with a = 5.189 Å (620 °C) corresponding to a/2 of pentlandite. The high-low inversion is… 

Phase Relations in the Fe–ni–s System from 875 To 650 °c

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Pentlandite is the dominant Ni-hosting ore mineral in most magmatic sulfide deposits and has conventionally been interpreted as being entirely generated by solid-state exsolution from the

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Pyrrhotite (Fe1-xS) is a non-stoichiometric iron monosulfide common in terrestrial rocks, ore deposits, and many extraterrestrial materials. The non-stoichiometry due to metal vacancies relates to a

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Phase equilibria in the system Fe-Ni-S were investigated by dry synthesis at 500°C and 400°C using three elements (Fe, Ni and S) and two synthetic sulfides (FeS and NiS). Phase diagrams of this

Fe0.45S0.55-Ni0.66S0.34 section of the Fe-Ni-S phase diagram

The Fe0.45S0.55-Ni0.66S0.34 section of the Fe-Ni-S phase diagram was constructed using thermal analysis, microscopy, X-ray powder diffraction, and electron probe microanalysis data obtained for the

The section of the Fe–Ni–S phase diagram constructed by directional crystallization and thermal analysis

A nontrivial polythermal cross-section through the Fe–Ni–S phase diagram was plotted using a combination of directional crystallization and DTA methods. The crystallized sample was grown from the

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