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| A soft, silvery metal chemically similar to the rare earths. It is protected from tarnishing by an oxide layer and is used to make the red phosphor for TV screens.
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Large chunk.
This is a fragment from a large ingot of yttrium metal. The element is used as a minor ingredient in number of alloys, including a combination with aluminium and chromium which has the unusual property - for a metal - of being a poor conductor of heat. Added to magnesium, it improves the latter's already excellent casting properties.
Source: donated by Anthony Lipmann
Size: 3"
Purity: > 99%
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YAG crystal.
YAG stands for yttrium aluminium garnet. This crystal was produced for use in a high powered laser. The green color comes from a small addition of chromium (Cr3+) ions which is a dopant to alter the characteristics of the laser radiation.
Source: Scientific Materials Corp
Size: 2"
Purity: n/a
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