Introduction: Buchanan et al. [1] and Zolensky et al. [2] described carbonaceous chondrite fragments in a variety of howardites and concluded that the majority are CM2 and CR2 materials. Gounelle et al. [3] also described similar, but very small, fragments in these meteorites. These clasts are important because they represent materials that were in orbital proximity to the HED parent body (4 Ve...

Abstract Pyrrhotites, characterized by the chemical formula Fe1–δS (0 < δ ≤ 1/8), represent an extended group of minerals that are derived from NiAs-type FeS aristotype. They contain layered arrangements ordered Fe vacancies, which at origin various magnetic signals registered certain natural rocks and can act as efficient electrocatalysts in oxygen evolution reactions ultrathin form. De...