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The fluorite structure refers to a common motif for compounds with the formula MX 2. [1] [2] The X ions occupy the eight tetrahedral interstitial sites whereas M ions occupy the regular sites of a face-centered cubic (FCC) structure. Many compounds, notably the common mineral fluorite (CaF 2), adopt this structure.
Fluoride (/ ˈ f l ʊər aɪ d, ˈ f l ɔːr-/) [3] is an inorganic, monatomic anion of fluorine, with the chemical formula F − (also written [F] −), whose salts are typically white or colorless. Fluoride salts typically have distinctive bitter tastes, and are odorless.
Calcium fluoride is the inorganic compound of the elements calcium and fluorine with the formula CaF 2. It is a white solid that is practically insoluble in water. It occurs as the mineral fluorite (also called fluorspar), which is often deeply coloured owing to impurities.
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF 2. It belongs to the halide minerals . It crystallizes in isometric cubic habit , although octahedral and more complex isometric forms are not uncommon.
Europium(II) fluoride is a bright yellowish solid with a fluorite structure. [3]EuF 2 can be used to dope a trivalent rare-earth fluoride, such as LaF 3, to create a vacancy-filled structure with increased conductivity over a pure crystal.
Sodium fluoride: yellow is fluorine, purple is sodium. They are isoelectronic, but fluorine is bigger because its nuclear charge is lower. The alkali metals form monofluorides. All are soluble and have the sodium chloride (rock salt) structure, [47] Because the fluoride anion is basic, many alkali metal fluorides form bifluorides with the ...
The same crystal structure is found in numerous ionic compounds with formula AB 2, such as ceria (CeO 2), zirconia (cubic ZrO 2), uranium dioxide (UO 2). In the corresponding anti-structure , called the antifluorite structure, anions and cations are swapped, such as beryllium carbide (Be 2 C) or lithium oxide (Li 2 O), potassium sulfate (K 2 SO ...
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