Breithauptite
![](/Images/godic/202501/01/Breithauptite-2296693552.jpg")
![Massive breithauptite with orange-brown nickeline and minor quartz from the Cobalt area of Ontario, Canada](/Images/godic/202501/01/Breithauptite3552.jpg")
![Nickel antimonide NiSb, an 11.5 g sample, grid size 1 cm](/Images/godic/202501/01/Nickel_antimonide3552.jpg")
Breithauptite is a nickel antimonide mineral with the simple formula NiSb. Breithauptite is a metallic opaque copper-red mineral crystallizing in the hexagonal - dihexagonal dipyramidal crystal system. It is typically massive to reniform in habit, but is observed as tabular crystals. It has a Mohs hardness of 3.5 to 4 and a specific gravity of 8.23.