High form of pentlandite and its thermal stability

@article{Sugaki1998HighFO,
  title={High form of pentlandite and its thermal stability},
  author={A. Sugaki and A. Kitakaze},
  journal={American Mineralogist},
  year={1998},
  volume={83},
  pages={133-140}
}
The high-temperature form of pentlandite (Fe4.5Ni4.5S8) was found to be stable between 584 6 3 and 865 6 3 8C, 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 5.189 A ˚ (620 8C) corresponding to a/2 of pentlandite. The high-low inversion is… Expand
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