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Calcium disilicide and Calcium monosilicide: Difference between pages

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Updating {{chembox}} (no changed fields - added verified revid - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref', 'ChEMBL_Ref', 'KEGG_Ref') per Chem/Drugbox validation (
 
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| CASNo = 12013-56-8
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| Formula = CaSi<sub>2</sub>
| Formula = CaSi
| MolarMass = 96.251 g/mol
| MolarMass = 68.164 g/mol<ref name=b92>{{RubberBible92nd|page=4.55}}</ref>
| Appearance = whitish grey - black solid
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| MeltingPt = 1033 °C
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'''Calcium silicide''' ([[Calcium|Ca]][[Silicon|Si]]<sub>2</sub>), also called '''calcium disilicide''', is an inorganic compound, a [[silicide]] of [[calcium]]. It is a whitish or dark grey to black solid matter with melting point 1033°C. It is insoluble in water, but may decompose when subjected to moisture, evolving [[hydrogen]] and producing [[calcium hydroxide]]. Decomposes in hot water. It is flammable and may ignite spontaneously in air. Its [[CAS number]] is {{CASREF|CAS=12013-56-8}}.
'''Calcium monosilicide''' ([[Calcium|Ca]][[Silicon|Si]]) is an inorganic compound, a [[silicide]] of [[calcium]]. It can be prepared by reacting elemental calcium and silicon at temperatures above 1000 °C.<ref>Brauer, Georg (1975) ''Handbuch der Präparativen Anorganischen Chemie''. Stuttgart. Vol. 1. p. 933. {{ISBN|3-432-02328-6}}.</ref> It is a [[Zintl phase]], where silicon has oxidation state −2 and covalence 2.


==References==
Industrial calcium silicide usually contains [[iron]] and [[aluminium]] as the primary contaminants, and low amounts of [[carbon]] and [[sulfur]].
<references />

Calcium silicide is used for manufacture of special metal [[alloy]]s, eg. for removing [[phosphorus]] and as a [[deoxidizer]].

In [[pyrotechnics]], it is used as fuel to make special mixtures, eg. for production of [[smoke]]s, in flash compositions, and in [[percussion cap]]s. Specification for pyrotechnic calcium silicide is MIL-C-324C. In some mixtures it may be substituted with [[ferrosilicon]]. Silicon-based fuels are used in some time delay mixtures, eg. for controlling of explosive bolts, hand grenades, and infrared decoys.{{fact | date = May 2009}} Smoke compositions often contain [[hexachloroethane]]; during burning they produce [[silicon tetrachloride]], which, like [[titanium tetrachloride]] used in [[smoke-screen]]s, reacts with air moisture and produces dense white fog. [[Gum arabic]] is used in some mixtures to inhibit calcium silicide decomposition. [http://groups.google.com/group/rec.pyrotechnics/browse_thread/thread/dc002fbb39b31aeb/63f84b3de3764a8e?lnk=raot]

[[Self-heating can]]s of military food rations developed during the World War II used a [[thermite]]-like mixture of 1:1 [[iron(II,III) oxide]] and calcium silicide. Such mixture, when ignited, generates moderate amount of heat and no gaseous products. [http://www.du.edu/~jcalvert/phys/bang.htm]

There is also a calcium silicide CaSi, CAS number {{CASREF|CAS=12013-55-7}}. See also CAS number {{CASREF|CAS=12737-18-7}}.

==See also==
* [[Magnesium silicide]]


{{Calcium compounds}}
{{Calcium compounds}}
{{Silicides}}


[[Category:Alkaline earth silicides]]
[[Category:Alkaline earth silicides]]
[[Category:Calcium compounds]]
[[Category:Calcium compounds]]
[[Category:Deoxidizers]]
[[Category:Pyrotechnic fuels]]

[[ar:سيليسيد الكالسيوم]]
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