Assertion: osmium | /r/AtLocation | siserskite up to 80 percent
Facets:
value: in iridosmine
type: LOCATION
value: in slight amounts in native platinum
type: OTHER
Source sentences:
text: Though rare, osmium is found in native alloys with other platinum metals: in siserskite (up to 80 percent), in iridosmine, in aurosmiridium (25 percent), and in slight amounts in native platinum.