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Keilhau-ite :: Keilhau-ite (n.) A mineral of a brownish black color, related to titanite in form. It consists chiefly of silica, titanium dioxide, lime, and yttria..

Dioxide :: Dioxide (n.) An oxide containing two atoms of oxygen in each molecule; binoxide.

Octahedrite :: Octahedrite (n.) Titanium dioxide occurring in acute octahedral crystals.

Carbonometer :: Carbonometer (n.) An instrument for detecting and measuring the amount of carbon which is present, or more esp. the amount of carbon dioxide, by its action on limewater or by other means..

Trimorphism :: Trimorphism (n.) The property of crystallizing in three forms fundamentally distinct, as is the case with titanium dioxide, which crystallizes in the forms of rutile, octahedrite, and brookite. See Pleomorphism..

Sulphurwort :: Sulphurous (a.) Having the characteristic odor of sulphur dioxide, or of hydrogen sulphide, or of other sulphur compounds..

Quartz :: Quartz (n.) A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque..

Incombustible :: Incombustible (a.) Not combustible; not capable of being burned, decomposed, or consumed by fire; uninflammable; as, asbestus is an incombustible substance; carbon dioxide is an incombustible gas..

Weldon''s Process :: Weldon's process () A process for the recovery or regeneration of manganese dioxide in the manufacture of chlorine, by means of milk of lime and the oxygen of the air; -- so called after the inventor..

Polianite :: Polianite (n.) Manganese dioxide, occurring in tetragonal crystals nearly as hard as quartz..

Pentathionic :: Pentathionic (a.) Pertaining to, or designating, an acid of sulphur obtained by leading hydrogen sulphide into a solution of sulphur dioxide; -- so called because it contains five atoms of sulphur..

Manganite :: Manganite (n.) A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid.

Cancrinite :: Cancrinite (n.) A mineral occurring in hexagonal crystals, also massive, generally of a yellow color, containing silica, alumina, lime, soda, and carbon dioxide..

Pyrolusite :: Pyrolusite (n.) Manganese dioxide, a mineral of an iron-black or dark steel-gray color and metallic luster, usually soft. Pyrolusite parts with its oxygen at a red heat, and is extensively used in discharging the brown and green tints of glass (whence its name)..

Ozone :: Ozone (n.) A colorless gaseous substance (O/) obtained (as by the silent discharge of electricity in oxygen) as an allotropic form of oxygen, containing three atoms in the molecule. It is a streng oxidizer, and probably exists in the air, though by he ordinary tests it is liable to be confused with certain other substances, as hydrogen dioxide, or certain oxides of nitrogen. It derives its name from its peculiar odor, which resembles that of weak chlorine..

Lime :: Lime (n.) Oxide of calcium; the white or gray, caustic substance, usually called quicklime, obtained by calcining limestone or shells, the heat driving off carbon dioxide and leaving lime. It develops great heat when treated with water, forming slacked lime, and is an essential ingredient of cement, plastering, mortar, etc..

Silica :: Silica (n.) Silicon dioxide, SiO/. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder..

Rutile :: Rutile (n.) A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite..

Oxygenate :: Oxygenate (v. t.) To unite, or cause to combine, with oxygen; to treat with oxygen; to oxidize; as, oxygenated water (hydrogen dioxide)..

Dinoxide :: Dinoxide (n.) Same as Dioxide.

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