Eskebornite is a selenide mineral with the formula CuFeSe2. It crystallizes in the tetragonal system and it has a brassy colour. Eskebornite is sometimes found as thick tabular crystals, but is more often found intergrown with other selenides. It is part of the chalcopyrite group and forms a series with chalcopyrite.
{{Infobox mineral|name=Eskebornite|boxwidth=|boxbgcolor=|image=|imagesize=|alt=|caption=|category=:Category:Selenide minerals|formula=CuFeSe2|molweight=| IMAsymbol = Ebn|strunz=2.CB.10a|dana=2.9.1.2|system=|class=Tetragonal|symmetry=|unit cell=|color=Brassy yellow|colour=|habit=Thick tabular crystals, massive|twinning=|cleavage={001} perfect|fracture=|tenacity=|mohs=3–3.5|luster=Metallic|streak=Black|diaphaneity=Opaque|gravity=|density=5.35 (measured) 5.44 (calculated)|polish=|opticalprop=|refractive=|birefringence=|pleochroism=Creamy yellow to yellowish brown|2V=|dispersion=|extinction=|length fast/slow=|fluorescence=None|absorption=|melt=|fusibility=|diagnostic=|solubility=Insoluble|impurities=Ag, S|alteration=|other=Distinctly magnetic|prop1=|prop1text=|references=}}
Eskebornite is a selenide mineral with the formula CuFeSe2. It crystallizes in the tetragonal system and it has a brassy colour. Eskebornite is sometimes found as thick tabular crystals, but is more often found intergrown with other selenides. It is part of the chalcopyrite group and forms a series with chalcopyrite.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).