Editing Platinum group (section)

== Properties and uses==
[[File:National prototype kilogram K20 replica.jpg|thumb|Replica of the [[NIST]] national prototype kilogram standard, made in 90% platinum, 10% iridium alloy]]

{|class=wikitable
|+ Significant uses of selected PGMs, 1996<ref name="ullmann-pt"/>
!PGM
!Use
!Thousand [[troy ounce|Toz]]
|-
|rowspan=4|[[Palladium]]
|autocatalysts||4470
|-
|electronics||2070
|-
|dental||1830
|-
|chemical reagents||230
|-
|rowspan=2|[[Platinum]]
|jewelry||2370
|-
|autocatalysts||1830
|-
|[[Rhodium]]||autocatalysts||490
|}

The platinum metals have many useful [[catalytic]] properties. They are highly resistant to wear and tarnish, making platinum, in particular, well suited for fine [[Jewelry|jewellery]]. Other distinctive properties include resistance to chemical attack, excellent high-temperature characteristics, high mechanical strength, good ductility, and stable [[Electricity|electrical]] properties.<ref name="Hunt4">{{cite journal|last=Hunt|first=L. B.|author2=Lever, F. M.|year=1969|title=Platinum Metals: A Survey of Productive Resources to industrial Uses|url=http://www.platinummetalsreview.com/pdf/pmr-v13-i4-126-138.pdf|journal=Platinum Metals Review|volume=13|issue=4|pages=126&ndash;138|doi=10.1595/003214069X134126138 |access-date=2009-10-02}}</ref> Apart from their application in jewellery, platinum metals are also used in anticancer drugs, industries, dentistry, electronics, and [[vehicle exhaust]] catalysts (VECs).<ref name=":02">{{Cite journal |title=Platinum group elements in the environment and their health risk |first1=Khaiwal |last1=Ravindra |first2=László |last2=Bencs |first3=René |last3=Van Grieken |year=2004 |journal=Science of the Total Environment |volume=318 |issue=1–3 |pages=1–43 |doi=10.1016/S0048-9697(03)00372-3 |pmid=14654273 |bibcode=2004ScTEn.318....1R |hdl=2299/2030 |hdl-access=free }}</ref> VECs contain solid platinum (Pt), palladium (Pd), and rhodium (Rh) and are installed in the exhaust system of vehicles to reduce harmful emissions, such as [[carbon monoxide]] (CO), by converting them into less harmful emissions.<ref>{{Cite journal |title=Palladium release from catalytic converter materials induced by road de-icer components chloride and ferrocyanide |first1=Deborah M. |last1=Aruguete |first2=Adam |last2=Wallace |first3=Terry |last3=Blakney |first4=Rose |last4=Kerr |first5=Galen |last5=Gerber |first6=Jacob |last6=Ferko |date=2020 |journal=Chemosphere |volume=245 |pages=125578 |doi=10.1016/j.chemosphere.2019.125578 |pmid=31864058 |bibcode=2020Chmsp.24525578A |s2cid=209440501 }}</ref>