Breithauptite was discovered by the author in several tension gashes, as roughly isometric, reddish gray crystals, in contact zones with galena and chalcopyrite.
Ullmannite is extremely rare, occurring only in one cleft, in grains small than 0.1 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.