Breithauptite was discovered by the author in several tension gashes, as roughly isometric, reddish gray crystals, in contact zones with galena and chalcopyrite.
1 ram, along the contacts between breithauptite and pyrite grains.
chalcopyrite, pentlandite, pyrite, cobaltite-gersdorffite series, arsenopyrite, ullmannite, violarite, chromite, ilmenite, sphalerite, covellite, argentopentlandite, breithauptite
, marcasite, nickeline, galena, rutile, barite, hessite, Au-Ag alloys, sperrylite, moncheite, sudburyite, testibiopalladite, kotulskite, mertieite-II, stibiopalladinite, geversite, melonite and four undefined minerals.
5, Detmold, Germany 32756) had a wide selection of rare elements, sulfides and sulfosalts, including a large number of specimens of the rare iron-nickel-antimony-arsenic mineral, seinajokite, accompanied by native antimony, westerveldite and breithauptite
, from the type locality at Seinajoki, Vaasa, Finland.