Hugoniot data for pyrrhotite and the Earth's core

Metal–silicate partitioning of cesium: Implications for core formation

“…However, the starting metal composition was pure FeS, which resulted in 33 wt% S in the metal. This is well outside the range of possibilities based on cosmochemical and geophysical arguments, which hold that Earth's core contains no more than 14 wt% S (Brown et al, 1984), and probably less than 5 wt% (Kargel and Lewis, 1993). The precipitous drop in D Cs with decreasing metallic S content, combined with the fact that no other parameter studied here could reasonably raise D Cs by another order of magnitude, precludes the possibility that Cs has been sequestered to Earth's core by simple metal-silicate partitioning.…”

Core Sizes and Internal Structure of Earth's and Jupiter's Satellites

“…For FeS at room conditions, ρ = 4.7 g cm −3 (Ahrens 1979, Brown et al 1984. Two boundary compositional models are considered for a core of constant density: a γ -iron core and a eutectic Fe-FeS core.…”

Physical properties of iron in the inner core

“…The compositional space of Fe-X with X any light element has been sparsely sampled in shock wave experiments at the conditions relevant for the core. Only binary compounds in the Fe-S system (pyrrhotite Fe 0.9 S [Brown et al, 1984 [Jeanloz and Ahrens, 1980;Yagi et al, 1988] have been exposed to shock. The data has been extrapolated to inner core conditions ] and compared to the required elastic parameters (Fig.…”