454 



wherry: native element minerals 



Auriferous. 



Lead. 



IRON GROUP. ISOMETRIC. 



Kg, Au 

 Pb 



Iron 



Fe 



Nickeliferous Fe, Ni 



Platiniferous Fe, Pt 



Nickel, ferriferous Ni, Fe 



Platinum, ferriferous Pt, Fe 



Palladium, platiniferous Pd, Pt 



Iridium, platiniferous Ir, Pt 



["Gold-amalgam" in part. The gold is 

 <j either in solid, isomorphous form, or dis- 

 [ solved, liquid form. 



When the minerals of Dana's "platinum- 

 iron group" are arranged according to 

 the periodic system, iron comes first, 

 and the group is here named after it. 

 "Ferrite." Native iron, both meteoritic 

 and terrestrial, may contain isomor- 

 phous copper, vanadium, chromium, 

 manganese, cobalt, nickel, ruthenium, 

 palladium, iridium, platinum, and per- 

 haps other metals; but only two of these 

 occur in sufficient amount to be re- 

 garded as giving rise to definite varie- 

 ties. 



"Edmonsonite," "kamacite,""lamprite," 

 J "plessite," "taenite." Meteoritic; the 

 varieties are chiefly separated on the 

 basis of structure. 

 Occurrence in nature reported by Osann, 

 Ann. Phys. Chem., 14: 329. 1827. (Not 

 in Dana.) 

 "Awaruite," "josephinite," "octibbe- 

 hite," "souesite." Both meteoritic and 

 terrestrial; the minerals referred to by 

 the synonyms have been regarded as 

 separate species, but there is no defi- 

 nite evidence that thej r are anything 

 but varieties of nickel containing small, 

 variable, amounts of isomorphous iron. 

 /"Native palladium." May also contain 

 \ small amounts of isomorphous iridium. 

 ["Native iridium." Named "iridium" by 

 Dana and others, although analyses 

 cited show the presence of at least 19% 

 of isomorphous platinum and smaller 

 amounts of other metals, especialy cop- 

 per and palladium; pure iridium is not 

 known to occur in nature. 

 Native platinum." Named platinum by 

 Dana and others, although analyses 

 show the presence of considerable 

 amounts of isomorphous copper, gold, 

 iron, nickel, rhodium, palladium, 

 osmium, and iridium; only two of 



