graphite hexagonal

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• Graphite — Catégorie I : Éléments natifs[1] Graphite natif Général …   Wikipédia en Français

• graphite — [ grafit ] n. m. • 1799; du gr. graphein « écrire » ♦ Variété naturelle de carbone cristallisé formée de carbone presque pur. Le graphite est employé dans la fabrication des crayons. ⇒ plombagine (cf. Mine de plomb). Électrodes de graphite.… …   Encyclopédie Universelle

• hexagonal — hexagonal, ale, aux [ ɛgzagɔnal, o ] adj. • 1632; de hexagone 1 ♦ Qui a six angles et six côtés. Figure, alvéole hexagonale. ♢ Dont la base est un hexagone. Pyramide hexagonale. ♢ Sc. Système hexagonal d un cristal, caractérisé par l existence d… …   Encyclopédie Universelle

• Graphite — Graph ite, n. [Gr. gra fein to write: cf. F. graphite. See {Graphic}.] (Min.) Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for… …   The Collaborative International Dictionary of English

• Graphite battery — Graphite Graph ite, n. [Gr. gra fein to write: cf. F. graphite. See {Graphic}.] (Min.) Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is… …   The Collaborative International Dictionary of English

• graphite — [graf′īt΄] n. [Ger graphit < Gr graphein, to write (see GRAPHIC): from its use as writing material] a very soft, black, hexagonal mineral of pure carbon, formed in thin plates and found in metamorphic rocks: used in making electrodes, paints,… …   English World dictionary

• Graphite — For other uses, see Graphite (disambiguation). Graphite Graphite specimen General Category Native element mineral …   Wikipedia

• graphite — graphitic /greuh fit ik/, adj. /graf uyt/, n. a very common mineral, soft native carbon, occurring in black to dark gray foliated masses, with metallic luster and greasy feel: used for pencil leads, as a lubricant, and for making crucibles and… …   Universalium

• Hexagonal crystal system — In crystallography, the hexagonal is one of the 7 crystal system, it contains 7 point groups . It has the same symmetry as a right prism with a hexagonal base. There is only one hexagonal Bravais lattice, which has six atoms per unit… …   Wikipedia

• hexagonal system — ▪ crystallography       one of the principal categories of structures to which a given crystalline solid can be assigned. Components of crystals in this system are located by reference to four axes three of equal lengths set at 120° to one… …   Universalium

• graphite — noun /ˈɡræfaɪt/ a) An allotrope of carbon consisting of planes of carbon atoms arranged in hexagonal arrays with the planes stacked loosely that is used as a dry lubricant and in lead pencils. b) A composite plastic made with graphite fibers… …   Wiktionary