Thank you thats really good to learn.
l am very interested but never found that.
Do you have a reference?
What i do know about Nb is that the outter electron is on its own in an s shell, so it is very available.
Also explains why Nb is high temp superconductor. Quantum theory tells us two such electrons can associate to form a spin zero particle, but still carry charge.
Ann: Further High-Grade Niobium Results from Equador - Brazil, page-254
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