I'll go with Cadmium.

On Fri, 28 Jan 2011 07:12:01 -0600, David D. Hillman 
<[log in to unmask]> wrote:

>Hi folks - Here is the Friday Element Quiz Question:
>
>The Question:
>
>The price of this element has increased by a factor of 6 during the last 2
>decades of the 20th Century. The majority of the world production of this
>element comes from fume/dust/slags from Zinc mining. This element is a
>superconductor below 3.37K. This element does not oxidize in room
>temperature air. Which element is being described?
>
>
>The winner of this week's quiz will get the exclusive use of Clumpy's
>services. Hey Bev - what did Clumpy finally accomplish for you?
>

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