Physics

Sphalerite

Sphalerite

Sphalerite Definition Sphalerite is a usually yellow-brown or brownish-black cubic mineral occurring either as single dodecahedral crystals or as granular masses. It is also called blende, or zinc blende, zinc sulfide (ZnS), the chief ore mineral of zinc. It often contains cadmium, arsenic, or ma.....

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Dolomite

Dolomite

Dolomite Definition Dolomite is a gray, pink, or white rhombohedral mineral. Dolomite occurs in curved saddlelike crystals with a pearly to glassy luster. It is a common rock-forming mineral. Its chemical formula: CaMg(CO3)2. It is the primary component of the sedimentary rock known as dolostone .....

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Marcasite

Marcasite

Marcasite Definition Marcasite is a light yellow to gray, metallic, orthorhombic mineral. Its chemical formula: FeS2 and sometimes called white iron pyrite. Marcasite is a polymorph of pyrite and looks similar to it but has a lower specific gravity, is paler in color, and often has a radiating fi.....

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Pyrrhotite

Pyrrhotite

Pyrrhotite Definition Pyrrhotite is a common bronze-coloured magnetic mineral consisting of ferrous sulphide in hexagonal crystalline form. It is also called magnetic pyrite, because the color is similar to pyrite and it is weakly magnetic. The magnetism decreases as the iron content increases, a.....

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Perovskite

Perovskite

Perovskite Definition Perovskite is a yellow, brown, or greyish-black mineral form of calcium titanate with some rare-earth elements, which is used in certain high-temperature ceramic superconductors. It is a calcium titanium oxide mineral composed of calcium titanate (CaTiO3). It is sought after.....

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Platinum

Platinum

Platinum Definition Platinum (symbol Pt) is a soft, ductile, malleable, silver-white metallic element that usually occurs with osmium, iridium, palladium, or nickel. Its name is derived from the Spanish term platina, meaning “little silver”. It has a high melting point and does not co.....

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Molybdenum

Molybdenum

Molybdenum Definition Molybdenum (symbol Mo) A hard, silvery-white metallic element that resists corrosion and retains its strength at high temperatures. The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores.....

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Vanadium

Vanadium

Vanadium Definition Vanadium (symbol V) is a soft, bright-white metallic element that occurs naturally in several minerals. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against furth.....

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Ilmenite

Ilmenite

Ilmenite Definition Ilmenite is a lustrous black to brownish rhombohedral mineral that is an ore of titanium. Ilmenite occurs in igneous rocks and is one of the principal dark minerals observed in beach sands. It is a weakly magnetic black or steel-gray solid. From the commercial perspective, ilm.....

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Brookite

Brookite

Brookite Definition Brookite (Tio2) is a reddish-brown to black mineral consisting of titanium oxide in orthorhombic crystalline form: occurs in silica veins. It is one of the three main forms of titanium dioxide. It forms distinct and unique crystals, and is often associated with the two other m.....

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About Rutile

About Rutile

About Rutile Definition Rutile is a lustrous red, reddish-brown, or black tetragonal mineral that is an ore of titanium. It is the most common natural form of TiO2. It comes in a surprising contrast of distinct habits and colors, making it a very interesting mineral. It has multiple unique crysta.....

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Titanium

Titanium

Titanium Definition Titanium is a shiny, white metallic element that occurs in all kinds of rocks and soils. It is lightweight, strong, and highly resistant to corrosion. Its Atomic number 22; atomic weight 47.87; melting point 1,660°C; boiling point 3,287°C; specific gravity 4.54; valence 2, 3.....

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