Some plutonium chemical compounds; plutonium dioxide, plutonium nitride, plutonium carbide, plutonium nitrate, plutonium trifluoride, plutonium chloride, etc.
Plutonium is least likely to have been a component of Earth as it is a man-made element that is not naturally occurring in significant quantities.
Plutonium is considered nonrenewable because it is a naturally occurring element that is formed through the process of nuclear reactions in stars. On Earth, plutonium is primarily produced in nuclear reactors through the transmutation of uranium-238. Once plutonium is used in nuclear reactions or nuclear weapons, it is consumed and cannot be naturally replenished on a human timescale.
The isotope symbol of plutonium with 146 neutrons is plutonium-246, represented as ^246Pu.
Because plutonium itself is so rare, none of its compounds are "common" in the usual sense. However, plutonium compounds with common other elements include fluoride, chloride, bromide, oxide, and sulfate.
Plutonium is only a trade affair between countries, under the control of IAEA.
Countries able to obtain now plutonium: USA, Russia, China, United Kingdom, France, Japan, India; probable Pakistan and Germany.
Plutonium is not a common metal; it is an artificial chemical element, dangerous, expensive and is obtained only in some countries.
Countries with plutonium facilities: USA, United Kingdom, France, Russia, India, Japan, China, Pakistan.
The artificial plutonium was prepared for the first time in December 1940.The natural isotope Pu-244 is primordial, as old as the Earth but exist only in traces.
Probable USA has the most plutonium.
Radium: Plutonium does not occur naturally, and magnesium has a low density for a metal.
Uranium is the main fuel used, but in some countries a mixture of uranium and plutonium is also used (MOX fuel)
Plutonium, Iron
Only a trace of plutonium is naturally found in the earth's crust. And it is always found with uranium because it is made by uranium's spontaneous fission, neutron release, and the subsequent neutron capture by another uranium nucleus to form the plutonium atom. Plutonium is not formed by the death of a star in a super nova like uranium is. Uranium is the heaviest element formed in that event. That's why there isn't any plutonium around as an ore. Just the trace amounts found with uranium. We're lucky there isn't a lot of plutonium around. It is highly toxic owing to its hightly radioactive nature. A link is provided to the Wikipedia article on plutonium.
It is known that uranium 238 is found in meteorites and Plutonium 242 is found in very small amounts naturally in Uranium ores here on earth. So I would take a guess that in meteorites where uranium is found, tiny amounts of plutonium 242 will also be found.
Plutonium exist in the Earth crust only as traces: near nuclear weapons test zones, near uranium mines or nuclear fuels recycling facilities.