Calcium Sulfide

(redirected from Calcium sulphide)

calcium sulfide

[′kal·se·əm ′səl‚fīd]
(inorganic chemistry)
CaS In pure form, white cubic crystals, slightly soluble in water; used as a base for luminescent materials. Also known as hepar calcies; sulfurated lime.

Calcium Sulfide

 

CaS, a salt; colorless crystals with a density of 2.58 g/cm3 and a melting point of 2000°C. Calcium sulfide is obtained by the calcination of CaSO4 with charcoal. It is used in the preparation of luminophors and in the tanning industry for the removal of hair from hides. Calcium hydrosulfide Ca(SH) 2 is used in the production of synthetic fibers.

References in periodicals archive ?
It is known from earlier studies [3] that oxidation of iron sulphide can occur in semicoke and that calcium sulphide hydrolyzes easily, and hydrogen sulphide ion in water in turn oxidizes to thiosulphate and sulphate.
Halton Borough Council is now awaiting a scientific report in the New Year which will detail exactly what chemicals have been fo und but large quan-tities of calcium sulphide waste are belie ved to have been un-earthed.
In this case chemisorption of hydrogen sulphide from the vapor-and-gas mixture in the reactor takes place, and sulphide sulphur in the ash residue occurs mainly as calcium sulphide CaS (Fig.
However, even the burning residue, so-called black ash, causes environmental concerns, as it contains some organic carbon and decomposable calcium sulphide.