Flourine is possibly not a stable element at all

Its only stable isotope is possibly not very stable and typically only occurs in conjunction with radioactive uranium or rare earth deposits

Anything “nuclear” should be considered “classified” and thus subject to the usual government lies, disinformation and misinformation on top of the usual ignorance. It’s a case of too much burning pitchblende, yellowcake, quicksilver, fluorides and shoddy X-rays at the dentist’s office, with professionals in various trades lying through their teeth.

poisoning the well | #TranslateHate
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Conversion and Deconversion - World Nuclear Association
Prior to enrichment, uranium oxide must be converted to a fluoride so that it can be processed as a gas, at low temperature. Conversion plants are operating commercially in Canada, China, France, Russia and the USA.

Fluorapatite: A valid IMA mineral species

Category:Fluorine minerals - Wikipedia

Good for the teeth or not?

These are very strange “*-ite” minerals which are brightly colored and/or glowing, exhibit strange properties, and typically do not occur in nature except in conjunction with radioactive uranium ore.

Fluorine is claimed to have one stable isotope.

Fluorine 19 | The Structured Atom Model
Fluorine 19 is the only stable isotope. The reason Fluorine is 19 and not 18 can be seen in the structure here. One side of the Carbon backbone nuclet has for the first time a so called “neutral 5-ending”. The ending is capped by two Deuterium nuclets and has a fifth extra neutron that support that side from collapsing or re-balancing to the other side of the Carbon. This particular ending can be seen as the extra needed structural integrity to keep the shape stable. Note that we see here that the both sides need to be in balance.

Otherwise fluorine is supposedly used to “enrich” uranium, but uranium hexafluoride seems far too horribly toxic and corrosive to be useful or practical in any purported industrial process.

Uranium hexafluoride - Hazardous Agents | Haz-Map
Uranium hexafluoride agent detailed information in Haz-Map database.
Uranium Hexafluoride - an overview | ScienceDirect Topics