Ok that sounds like another one disproven via evidence.
Next
eudialyte is not refractory, no scrubbers needed no fluorine in ore or needed to be used
"The best performance for extraction of Zr from eudialyte concentrate is ensured by the use of H2SO4. However, a sufficiently high extraction efficiency of Zr can be only be achieved when a large excess of acid is used (Zakharov et al., 2011) or by the introduction of potentially toxic fluoride ions (Dibrov et al., 2002; Litvinova and Chirkist, 2013)"
https://www.sciencedirect.com/science/article/abs/pii/S0304386X18302548
Another research team with another 32 references
ETM Misinformation, page-8
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