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What is meant by fluorite structure?

What is meant by fluorite structure?

A type of ionic crystal structure in which the cations have an expanded face-centred cubic arrangement with the anions occupying both types of tetrahedral hole. The cations have a coordination number of 8 and the anions have a coordination number of 4.

What is the difference between fluorite and Antifluorite structure?

The antifluorite structure has ccplfcc anions with cations in all (T+ and T-) tetrahedral sites. The difference between antifluorite and fluorite is that anti- fluorite refers to an anion array with tetrahedral cations, whereas fluorite has the inverse arrangement with a ccp cation array and tetrahedral anions.

What is the coordination number of fluorite?

1. Fluorite structure (CaF2). In the fluorite structure, the cation site (Ca2+) is surrounded by a cubic array of eight F anions, and the anions (F-) in theirs tetrahedral holes have four nearest neighbors. So the structure is said to have 8:4 coordination.

Is fluorite face centered?

The fluorite structure, seen in calcium fluoride, has the calcium ions in a face centered cubic array with the fluoride ions in all (8) of the tetrahedral holes.

What is the formula of fluorite?

Fluorite (CaF2) | CaF2 – PubChem.

What is the uses of fluorite?

Physical Properties of Fluorite
Chemical Classification Halide
Crystal System Isometric
Uses Numerous uses in the metallurgical, ceramics, and chemical industries. A source of fluorine, hydrofluoric acid, metallurgical flux. High-clarity pieces are used to make lenses for microscopes, telescopes, and cameras.

What do we use fluorite for?

Industrially, fluorite is used as a flux for smelting, and in the production of certain glasses and enamels. The purest grades of fluorite are a source of fluoride for hydrofluoric acid manufacture, which is the intermediate source of most fluorine-containing fine chemicals.

What is the structure of CaF2?

Calcium fluoride is the inorganic compound of the elements calcium and fluorine with the formula CaF2….Calcium fluoride.

Crystal structure cubic crystal system, cF12
Space group Fm3m, #225
Lattice constant a = 5.451 Å, b = 5.451 Å, c = 5.451 Å α = 90°, β = 90°, γ = 90°
Coordination geometry Ca, 8, cubic F, 4, tetrahedral

What is true fluorite?

Fluorite, composition CaF2, is a halide mineral of uncommon occurrence in soils. Fluorite forms perfect cubes, often with penetration twins. It is commonly translucent to transparent, and has a wide range of colors from colorless to green, yellow, bluish-green, or purple.

What are the characteristics of fluorite?

Unit cell a = 5.4626 Å; Z = 4
Color Colorless, although samples are often deeply colored owing to impurities; Purple, lilac, golden-yellow, green, blue, pink, champagne, brown.
Crystal habit Well-formed coarse sized crystals; also nodular, botryoidal, rarely columnar or fibrous; granular, massive

What are interesting facts about fluorite?

Interesting Fluorite Facts: Pure fluorite is colorless. Fluorite is used to lower the melting point of metal during the production of aluminum. Fluorite glows when it is exposed to UV light. Although fluorite can be seen in virtually all the primary colors, it is mostly commonly found in yellow, green, blue, or purple.

What does the name fluorite mean?

Fluorite was named after the Latin word, fluere, meaning “to flow,” stemming from Fluorite’s ability to act as a flux between metals. Because of its rainbow coloring, Fluorite was thought to house rainbows. In China, Fluorite has been used to sculpt ornate vessels for over three centuries.

What does fluorite symbolize?

Fluorite supports spirituality and thought, focus and concentration, and balance in all aspects of one’s life. Known as the “Genius Stone,” Fluorite represents the highest state of mental achievement, boosting aptitude and discernment, the absorption of new information, and helping one work through complex issues.

What are important uses of fluorite?

Uses of Fluorite. Fluorite has a wide variety of uses. The primary uses are in the metallurgical, ceramics, and chemical industries; however, optical, lapidary, and other uses are also important.