Авторы: Volk M., Gilder S., Feinberg J.

2016 г.

JGR

Pyrrhotite refers to a group of non-stoichiometric iron sulfides, Fe_1−xS with 0.08 < x < 0.125, that are important carriers of magnetic remanence in some terrestrial and extraterrestrial rocks. It is especially important as the main magnetic carrier in some Martian meteorites. Alternating layers of ordered vacancies in the iron layers lead to different superstructures. The most iron deficient 4C pyrrhotite (Fe₇S₈) is ferromagnetic. It undergoes the “Besnus transition” at T_Bes ≈ 30 K, which is not well understood. Meteorites at the outer edge of the meteorite belt can cool to T ≈ 120-150 K.

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