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- Defluorination of fluorspar :pyrohydrolysis at 1,500⁰ C.
- Defluorination of fluorspar :preparation of aluminum fluoride from siliceous fluorspar
- Fluorine analyses :control method for various compounds
- Separation of HF from HF-SiF₄-H₂O mixtures
- Adaptation of the Pedersen process to the ferruginous bauxites of the Pacific Northwest