单词 | fluorite |
释义 | fluoriten. Mineralogy. A mineral consisting of calcium fluoride, typically occurring as cubic or octahedral crystals, colourless when pure but often coloured by impurities (cf. Blue John n. 2). Cf. fluorspar n.Chemical formula: CaF2. Crystal system: cubic. ΘΚΠ the world > the earth > minerals > types of mineral > halides > [noun] > fluorite group > calcium fluoride fluorspar?1770 Derbyshire spar1772 fluor1772 tiger-stone1829 fluorite1844 spodiosite1887 1814 T. Allan Mineral. Nomencl. (at cited word) Fluorite Nap[ione].] 1844 J. Donovan Rome Anc. & Mod. II. 109 The zoccle of the altar and two lateral compartments are ancient fluorite, of the rarest quality. 1887 J. D. Dana Man. Mineral. & Petrogr. 228 Massive fluorite receives a high polish. 1929 G. P. Merrill Minerals from Earth & Sky ii. iii. 181 In fluorite..the dispersion is very slight and the separation not distinct. 1954 J. F. Kirkaldy Gen. Princ. Geol. xii. 169 Greisening..produces a rock composed essentially of white mica and quartz and often containing fluorine-bearing minerals, such as fluorite and topaz. 2001 Tropical Fish Hobbyist Apr. 148/1 20 percent potting soil mix, 20 percent fluorite. This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.1844 |
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