  Evaporation boat. 
This strip of metal has a depression in it meant to hold a sample of some material to be analyzed.  Called a "boat", it is made of tungsten to resist the high temperature of the furnace used to evaporate the material it's holding.   
Source: Ivan Timokhin 
Contributor: Ivan Timokhin 
Acquired: 30 September, 2007 
Text Updated: 4 October, 2007 
Price: Donated 
Size: 4" 
Purity: 95%
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