A new and improved video about Thulium. More links and info in full description ↓↓↓
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Cleve on the discovery of Thulium: https://babel.hathitrust.org/cgi/pt?id=umn.31951d00008409h&view=1up&seq…
Thulium I paper by C.James (with the 15,000 crystallisations): https://pubs.acs.org/doi/10.1021/ja02221a007
Thanks to Anthony Lipmann for the samples
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