Editing Platinum group (section)

===Osmium===
[[Osmiridium]] is a naturally occurring alloy of iridium and osmium found in platinum-bearing river sands in the [[Ural Mountains]] and in [[North America|North]] and [[South America]]. Trace amounts of osmium also exist in nickel-bearing ores found in the [[Greater Sudbury|Sudbury]], [[Ontario]], region along with other platinum group metals. Even though the quantity of platinum metals found in these ores is small, the large volume of nickel ores processed makes commercial recovery possible.<ref name="Platinum-Geological_Survey"/><ref name="Emsley">{{cite book |title = Nature's Building Blocks: An A-Z Guide to the Elements |last = Emsley |first=J. |publisher = Oxford University Press |year = 2003 |location = Oxford, England, UK |isbn = 0-19-850340-7 |chapter = Iridium |pages=201–204 |chapter-url=https://books.google.com/books?id=j-Xu07p3cKwC&pg=PA202}}</ref>