actinide

(thing) by CentrX Fri May 05 2000 at 22:20:58
Any of the elements in the series (actinide series) of radioactive, metallic chemical elements from element 89 (actinium) through element 103 (lawrencium). These elements resemble lanthanides in electronic structure.
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(thing) by omegas Fri May 05 2000 at 23:01:44

Naturally occuring. Radioactive compounds generally found in uranium ore. Actinides are known to interfere with Federation sensors.
TNG: The Mind's Eye - The crew of the Enterprise encountered these in the Ilkalian asteroid belt. The actinides made it difficult to locate the Kriosian rebels.

The Particles of Star Trek

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