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- Molecular formula: CaS
- Molar mass: 72.143
- CAS Registry Number: Not available
- Appearance: Calcium sulfide, 99% (metals basis excluding Mg), Mg <1%; Calcium sulfide, 99.9% (metals basis excluding Sr), Sr typically 500 ppm; Calcium sulfide, 99% (metals basis excluding Mg), Mg <1%; Calcium sulfide, 99.9% (metals basis excluding Sr), Sr typically 500 ppm
- Melting point: Not available
- Boiling point: Not available
- Solubility: Not available
- Safety sheet: Not available
- Spectra: Check on SDBS. Add Spectra (Help).
Calcium sulfide is the chemical compound with the formula CaS. This white material crystallizes in cubes like rock salt. CaS has been studied as a component in a process that would recycle gypsum, a product of flue-gas desulfurization. Like many salts containing sulfide ions, CaS typically has an odour of H2S, which results from small amount of this gas formed by hydrolysis of the salt.
In terms of its atomic structure, CaS crystallizes in the same motif as sodium chloride indicating that the bonding in this material is highly ionic. The high melting point is also consistent with its description as an ionic solid. In the crystal, each S2− ion is surrounded by an octahedron of six Ca2+ ions, and complementarily, each Ca2+ ion surrounded by six S2− ions.
Calcium sulfide (IUPAC Name)
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