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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..

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

Brat :: Brat (n.) A thin bed of coal mixed with pyrites or carbonate of lime.

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..

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

Mispickel :: Mispickel (n.) Arsenical iron pyrites; arsenopyrite.

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..

Pyrites :: Pyrites (pl. ) of Pyrit.

Chalcopyrite :: Chalcopyrite (n.) Copper pyrites, or yellow copper ore; a common ore of copper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color..

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

Lav/sium :: Lav/sium (n.) A supposed new metallic element. It is said to have been discovered in pyrites, and some other minerals, and to be of a silver-white color, and malleable..

Pyritiferous :: Pyritiferous (a.) Containing or producing pyrites.

Brass :: Brass (n.) Lumps of pyrites or sulphuret of iron, the color of which is near to that of brass..

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..

Alum Shale :: Alum shale () A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock..

Pyrrhotite :: Pyrrhotite (n.) A bronze-colored mineral, of metallic luster. It is a sulphide of iron, and is remarkable for being attracted by the magnet. Called also magnetic pyrites..

Seleniferous :: Seleniferous (a.) Containing, or impregnated with, selenium; as, seleniferous pyrites..

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

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

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

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