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Indium :: Indium (n.) A rare metallic element, discovered in certain ores of zinc, by means of its characteristic spectrum of two indigo blue lines; hence, its name. In appearance it resembles zinc, being white or lead gray, soft, malleable and easily fusible, but in its chemical relation it resembles aluminium or gallium. Symbol In. Atomic weight, 113.4..

Catalytic :: Catalytic (n.) An agent employed in catalysis, as platinum black, aluminium chloride, etc..

Aluminate :: Aluminate (n.) A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.

Methide :: Methide (n.) A binary compound of methyl with some element; as, aluminium methide, Al2(CH3)6..

Aluminum :: Aluminum (n.) See Aluminium.

Cyanite :: Cyanite (n.) A mineral occuring in thin-bladed crystals and crystalline aggregates, of a sky-blue color. It is a silicate of aluminium..

Neogen :: Neogen (n.) An alloy resembling silver, and consisting chiefly of copper, zinc, and nickel, with small proportions of tin, aluminium, and bismuth..

Sapphire :: Sapphire (n.) Native alumina or aluminium sesquioxide, Al2O3; corundum; esp., the blue transparent variety of corundum, highly prized as a gem..

Minargent :: Minargent (n.) An alloy consisting of copper, nickel, tungsten, and aluminium; -- used by jewelers..

Aluminic :: Aluminic (a.) Of or containing aluminium; as, aluminic phosphate..

Thomsenolite :: Thomsenolite (n.) A fluoride of aluminium, calcium, and sodium occurring with the cryolite of Greenland..

Alumina :: Alumina (n.) One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3..

Aluminium :: Aluminium (n.) The metallic base of alumina. This metal is white, but with a bluish tinge, and is remarkable for its resistance to oxidation, and for its lightness, having a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al..

Ekaluminium :: Ekaluminium (n.) The name given to a hypothetical element, -- later discovered and called gallium. See Gallium, and cf. Ekabor..

Thallium :: Thallium (n.) A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7..

Yttrium :: Yttrium (n.) A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89..

Andalusite :: Andalusite (n.) A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain..

Chloralum :: Chloralum (n.) An impure aqueous solution of chloride of aluminium, used as an antiseptic and disinfectant..

Clay :: Clay (n.) A soft earth, which is plastic, or may be molded with the hands, consisting of hydrous silicate of aluminium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities..

Amphibole :: Amphibole (n.) A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constit

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