| http://www.w3.org/ns/prov#value | - Suitable sources of fluoride ions include, for example, hydrogen fluoride, ammonium fluoride, ammonium hydrogen bifluoride, potassium fluoride, potassium hydrogen bifluoride, fluotitanic acid, fluosilicic acid, fluozirconic acid, fluoboric acid, and other fluoride salts, fluoride acids, fluoride metal complexes, and combinations thereof.
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