![]() Lump graphite (or vein graphite) occurs in fissure veins or fractures and appears as massive platy intergrowths of fibrous or acicular crystalline aggregates, and is probably hydrothermal in origin.Amorphous graphite: very fine flake graphite is sometimes called amorphous.When broken the edges can be irregular or angular Crystalline small flakes of graphite (or flake graphite) occurs as isolated, flat, plate-like particles with hexagonal edges if unbroken. ![]() The principal types of natural graphite, each occurring in different types of ore deposits, are It is a good (but not excellent) conductor of both heat and electricity. Under high pressures and temperatures it converts to diamond. Synthetic and natural graphite are consumed on large scale (300 kton/year, in 1989) for uses in pencils, lubricants, and electrodes. Graphite occurs naturally and is the most stable form of carbon under standard conditions. It consists of stacked layers of graphene. ![]() Graphite ( / ˈ ɡ r æ f aɪ t/) is a crystalline form of the element carbon. Strongly anisotropic, conducts electricity, greasy feel, readily marks ![]() Soluble in molten nickel, warm chlorosulfuric acid Opaque, transparent only in extremely thin flakes Tabular, six-sided foliated masses, granular to compacted massesįlaky, otherwise rough when not on cleavage Iron-black to steel-gray deep blue in transmitted light ![]()
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