SpringerImages - The NiAs structure of stoichiometric troilite FeS. In nonstoichiometric monoclinic pyrrhotite Fe7S8 the cation layers (hatched circles) are believed to be alternatively filled and partly filled. The adjacent layers have opposing and unequal magnetizations that lie in the basal planes (like hematite, ).

The NiAs structure of stoichiometric troilite FeS. In nonstoichiometric monoclinic pyrrhotite Fe7S8 the cation layers (hatched circles) are believed to be alternatively filled and partly filled. The adjacent layers have opposing and unequal magnetizations that lie in the basal planes (like hematite, ).

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Fig 38

The NiAs structure of stoichiometric troilite FeS. In nonstoichiometric monoclinic pyrrhotite Fe₇S₈ the cation layers (hatched circles) are believed to be alternatively filled and partly filled. The adjacent layers have opposing and unequal magnetizations that lie in the basal planes (like hematite, ).

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The pyrrhotites Fe _1-x S (0 < x < 0.13) crystallize in the NiAs structure ( Fig.

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