Niobium Metal Powder 99.999% (20g) A Transition Metal

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is a 20 gram sample of Niobium (Columbium) powder from Spex Industries. Assay is 99.999 + (3 -9's plus). These samples were given to me by a fellow chemist (specialty X-ray fluorescence spectroscopy). The sample will be shipped USPS Priority. No returns.