My abundance and location on the planet

My abundance? It's naturally nil (or, in baby language, zero) on Earth and throughout the whole universe because I'm a synthetic and man-made material! I know. "Man-made". 

I'm exclusively in specialized high-security research laboratories and nuclear facilities. "Like what?" You may ask. Well, to you I give examples of Lawrence Berkeley National Laboratory, Argonne National Laboratory, Los Alamos National Laboratory, Oak Ridge National Laboratory in the U.S. and select abroad facilities like the Japan Atomic Energy Agency. I'm only there for basic scientific research. I know, "basic", but I'm still cool!