![The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160670001 | agefotostock The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160670001 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/3aad661caf1e811da7a49fbc1a309f92/ckp-p201811160670001.jpg)
The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160670001 | agefotostock
![The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652801 | agefotostock The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652801 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/01b2d0fe31b9b0ba435c0d5a9cb516e3/ckp-p201811160652801.jpg)
The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652801 | agefotostock
![The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652401 | agefotostock The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652401 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/7b01a6a60e2a0b5734db1d2db506779c/ckp-p201811160652401.jpg)
The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652401 | agefotostock
![Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41378-022-00433-8/MediaObjects/41378_2022_433_Figa_HTML.png)
Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering
![Er Ashish K Singh on Twitter: "The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a platinum-iridium standard Er Ashish K Singh on Twitter: "The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a platinum-iridium standard](https://pbs.twimg.com/media/DaqJWYlX0AE85Eh.jpg)
Er Ashish K Singh on Twitter: "The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a platinum-iridium standard
![Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram](https://c8.alamy.com/comp/R24YPT/brno-czech-republic-16th-nov-2018-the-platinum-and-iridium-alloy-cylinder-pictured-on-november-16-2018-at-the-czech-metrology-institute-in-brno-czech-republic-will-no-longer-be-a-kilogram-standard-representatives-of-individual-countries-at-the-international-bureau-of-weights-and-measures-bipm-conference-as-expected-have-decided-to-redefine-the-kilogram-and-other-basic-units-the-base-unit-of-mass-is-newly-derived-from-the-fixed-value-of-the-planck-constant-credit-igor-zehlctk-photoalamy-live-news-R24YPT.jpg)