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KCaTantalum Technical DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgUubUutUuqUupUuhUusUuo

Superconducting powder
An example of the element Tantalum

Sample Image
Tantalum Superconducting powder
Superconducting powder.
From the eBay item description, which pretty much sums up what this item is:
This auction is for a very unusual, what I think would be called a Salesman Sample, of 5 exotic metal disks. The brown plastic case that measures 2.50 in. by 6 in., was received by my Father when he visited the Kawecki Berylco Industries in the 1970's. The company was bought by Cabot Corp. in the late 70's. The disks measure 1.25 in. dia. by .1in. thick. According to the description in the case the 5 metals are Beryllium, Lockalloy, Beryllium Copper, Columbium [an older name for niobium], Tantalum.
The individual disks are listed under their respective elements (beryllium for lockalloy, copper for beryllium copper).
Source: eBay seller jacav111
Contributor: Theodore Gray
Acquired: 27 December, 2008
Price: $134
Size: 6"
Composition: BeAlCuNbTa
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