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barnabus's avatar

Actually, niobium, tantalum, beryllium, and rubidium are all quite valuable. But the strict definition of rare-earths are lanthanides (f-block) because in the Mendeleyev's periodic table they appear next right to the alkali-earths (group 2) and have somewhat related chemical features. Even though somewhat more electronegative and less reactive.

On a different note - the map updates are excellent! At the moment, it looks as if SMO is clearing out the last vestiges of Ukrainians from that corner of the Donetsk Oblast. Instead of breaching full steam asap into the neighboring Dnepropetrovsk?

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Anna's avatar

Thank you!

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