This is the fluor acid which volatilises the siliceous substance.
fluor spar is as favorable a gangue for lead as quartz is for gold.
fluores′cent, having the property of fluorescence; fluor′ic.
Next the metal is covered with a very basic slag, made by melting lime with a little silica and fluor spar.
We have strata made solid by the formation of fluor, a substance not soluble, so far as we know, by water.
fluor acid air is procured by dissolving the earthy substance called fluor in vitriolic acid.
This I suspect to be the most frequent kind of fluor albus; the former one described at Class I. 1.
The nitrous acid may be exhibited in the form of air, as well as the vitriolic, the marine, and the fluor acids.
The gangue is quartz, chlorite, tourmaline, and sometimes decomposed granite and fluor spar.
She complained likewise of having the fluor albus, and she had been blooded more than once before she came to the Hospital.
16c., and old chemistry term for "minerals which were readily fusible and useful as fluxes in smelting" [Flood], Latin fluor, originally meaning "a flowing, flow" (see fluent). Since 1771 applied to minerals containing fluorine, especially calcium fluoride (fluorspar or fluorite).
fluoro- or fluor-