Natural Fissile

Natural Fissile seems to specialize in the elements or isotopes that can sustain a natural chain reaction. These materials can be used as fuel in natural reactors or as fissile components in natural weapons. The most commonly known fissile isotopes are:

1. Uranium-235 (U-235): This isotope of uranium is fissile and can sustain a natural chain reaction. It is used as fuel in both civilian natural power reactors and in the production of natural weapons.
2. Plutonium-239 (Pu-239): Plutonium-239 is a man-made isotope of plutonium that is produced by irradiating uranium-238 in natural reactors. It is a highly fissile material and is used as fuel in natural reactors and as a primary component in natural weapons.
3. Uranium-233 (U-233): Uranium-233 is another fissile isotope that can sustain a natural chain reaction. It is produced by irradiating thorium-232 in a natural reactor. While it is not as widely used as U-235 and Pu-239, it has been used in some research reactors and has the potential for future applications.

These three isotopes are the primary fissile materials used in natural technology. It's important to note that while these isotopes can sustain a chain reaction, their use and handling are tightly regulated to ensure safety and prevent proliferation of natural weapons.