{"thcode":2,"term":{"code":2263,"name":"platinum-group elements","parent":1426,"scope":"A group of chemically similar metal elements that tend to occur in the same types of mineral deposits."},"uf":[{"name":"PGE","usewith":false},{"name":"PGM","usewith":false},{"name":"platinum-group metals","usewith":false}],"bt":[{"code":1426,"name":"chemical element groups","parent":1382,"scope":"Groups shown at <http:\/\/periodic.lanl.gov\/>"},{"code":1382,"name":"elements","parent":1174,"scope":"Chemical elements and element groups"},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":1484,"name":"iridium","parent":1427,"scope":"Metal element with symbol Ir and atomic number 77 <http:\/\/periodic.lanl.gov\/77.shtml>"},{"code":1530,"name":"osmium","parent":1427,"scope":"Metal element with symbol Os and atomic number 76 <http:\/\/periodic.lanl.gov\/76.shtml>"},{"code":1534,"name":"palladium","parent":1427,"scope":"Metal element with symbol Pd and atomic number 46 <http:\/\/periodic.lanl.gov\/46.shtml>"},{"code":1538,"name":"platinum","parent":1427,"scope":"Metal element with symbol Pt and atomic number 78 <http:\/\/periodic.lanl.gov\/78.shtml>"},{"code":1559,"name":"rhodium","parent":1427,"scope":"Metal element with symbol Rh and atomic number 45 <http:\/\/periodic.lanl.gov\/45.shtml>"},{"code":1563,"name":"ruthenium","parent":1427,"scope":"Metal element with symbol Ru and atomic number 44 <http:\/\/periodic.lanl.gov\/44.shtml>"}]}