from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A double salt of fluoric acid and phosphoric acid.
from the GNU version of the Collaborative International Dictionary of English
- n. A double salt of fluoric and phosphoric acids.
from The Century Dictionary and Cyclopedia
- n. In mineralogy, a phosphate containing fluorin as an essential part.
Sorry, no etymologies found.
Thus the sulphate constitutes the minerals anhydrite, alabaster, gypsum, and selenite; the carbonate occurs dissolved in most natural waters and as the minerals chalk, marble, calcite, aragonite; also in the double carbonates such as dolomite, bromlite, barytocalcite; the fluoride as fluorspar; the fluophosphate constitutes the mineral apatite; while all the more important mineral silicates contain a proportion of this element.