Abstract
This paper shows how the structural chemistry of iron sulfides is complicated by three factors: (1) the octahedral-site Fe 2+ band is overlapped by the S 2−:3p 6 band, (2) intraatomic exchange stabilization can give rise to localized α-spin atomic moments and narrow-band β-spin electrons, and (3) strong FeSFe interactions may introduce narrow σ∗ bands and low-spin configurations.
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