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Persulphide :: Persulphide (n.) A sulphide containing more sulphur than some other compound of the same elements; as, iron pyrites is a persulphide; -- formerly called persulphuret..

Stanno- :: Stannite (n.) A mineral of a steel-gray or iron-black color; tin pyrites. It is a sulphide of tin, copper, and iron..

Pyrites :: Pyrites (pl. ) of Pyrit.

Copperas :: Copperas (n.) Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate..

Loellingite :: Loellingite (n.) A tin-white arsenide of iron, isomorphous with arsenopyrite..

Ampelite :: Ampelite (n.) An earth abounding in pyrites, used by the ancients to kill insects, etc., on vines; -- applied by Brongniart to a carbonaceous alum schist..

Magistral :: Magistral (n.) Powdered copper pyrites used in the amalgamation of ores of silver, as at the Spanish mines of Mexico and South America..

Firestone :: Firestone (n.) Iron pyrites, formerly used for striking fire; also, a flint..

Sulphur :: Sulphur (n.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral sulphur is 2.05; of prismatic sulphur, 1.96..

Pyritical :: Pyritical (a.) Of or pertaining to pyrites; consisting of, or resembling, pyrites..

Pyritohedron :: Pyritohedron (n.) The pentagonal dodecahedron, a common form of pyrite..

Pyritaceous :: Pyritaceous (a.) Of or pertaining to pyrites. See Pyritic.

Millerite :: Millerite (n.) A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; -- sometimes called hair pyrites..

Danaite :: Danaite (n.) A cobaltiferous variety of arsenopyrite.

Mundic :: Mundic (n.) Iron pyrites, or arsenical pyrites; -- so called by the Cornish miners..

Bisulphide :: Bisulphide (n.) A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret..

Arsenopyrite :: Arsenopyrite (n.) A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel..

Pyrites :: Pyrites (n.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color..

Pyritize :: Pyritize (v. t.) To convert into pyrites.

Marcasite :: Marcasite (n.) A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites..

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