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	{{chembox		{{chembox
			| Verifiedfields = changed
⚫	| verifiedrevid = 287040368
			| Watchedfields = changed
		⚫	| verifiedrevid = 432053594
	| ImageFile =		| ImageFile =
	| ImageSize =		| ImageSize =
	| IUPACName = Monocalcium aluminate		| IUPACName = Monocalcium aluminate
	| OtherNames =		| OtherNames =
	| Section1 = {{Chembox Identifiers		|Section1={{Chembox Identifiers
	| Abbreviations =		| Abbreviations =
			| CASNo_Ref = {{cascite|changed|CAS}}
	| CASNo =
	| EINECS =		| CASNo = 12042-68-1
			| CASNo_Comment = bad smiles
⚫	| PubChem =
	| SMILES =		| ChemSpiderID = 140191
	| InChI =		| EC_number = 234-931-0
			| DTXSID = DTXSID8049672
		⚫	| PubChem = 159415
	| RTECS =		| RTECS =
	| MeSHName =		| MeSHName =
			| ChEBI_Ref = {{ebicite|correct|EBI}}
	| ChEBI =		| ChEBI =
	| KEGG_Ref = {{keggcite|correct|kegg}}		| KEGG_Ref = {{keggcite|correct|kegg}}
	| KEGG =		| KEGG =
			| StdInChI=1S/2Al.Ca.4O/q;;+2;;;2*-1
	| ATCCode_prefix =
			| StdInChIKey = XFWJKVMFIVXPKK-UHFFFAOYSA-N
	| ATCCode_suffix =
			| SMILES = =O.=O.
	| ATC_Supplemental =}}
			}}
	| Section2 = {{Chembox Properties		|Section2={{Chembox Properties
	| Formula = CaAl<sub>2</sub>O<sub>4</sub>		| Formula = CaAl<sub>2</sub>O<sub>4</sub>
	| MolarMass =		| MolarMass = 158.038676 g/mol
	| Appearance =		| Appearance =
	| Density =		| Density =
	| MeltingPt =		| MeltingPt =
	| Melting_notes =		| MeltingPt_notes =
	| BoilingPt =		| BoilingPt =
	| Boiling_notes =		| BoilingPt_notes =
	| Solubility =		| Solubility =
	| SolubleOther =		| SolubleOther =
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	| pKa =		| pKa =
	| pKb = }}		| pKb = }}
	| Section3 = {{Chembox Structure		|Section3={{Chembox Structure
	| CrystalStruct =		| CrystalStruct =
	| Coordination =		| Coordination =
	| MolShape = }}		| MolShape = }}
	| Section4 = {{Chembox Thermochemistry		|Section4={{Chembox Thermochemistry
	| DeltaHf =		| DeltaHf =
	| DeltaHc =		| DeltaHc =
	| Entropy =		| Entropy =
	| HeatCapacity = }}		| HeatCapacity = }}
	| Section5 = {{Chembox Pharmacology		|Section5={{Chembox Pharmacology
	| AdminRoutes =		| AdminRoutes =
	| Bioavail =		| Bioavail =
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	| Legal_AU =		| Legal_AU =
	| Legal_CA =		| Legal_CA =
	| PregCat =		| Pregnancy_category =
	| PregCat_AU =		| Pregnancy_AU =
	| PregCat_US = }}		| Pregnancy_US = }}
	| Section6 = {{Chembox Explosive		|Section6={{Chembox Explosive
	| ShockSens =		| ShockSens =
	| FrictionSens =		| FrictionSens =
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	| REFactor = }}		| REFactor = }}
	| Section7 = {{Chembox Hazards		|Section7={{Chembox Hazards
			| GHSPictograms = {{GHS05}}{{GHS07}}
	| ExternalMSDS =
	| EUClass =		| GHSSignalWord = Danger
			| HPhrases = {{H-phrases|315|318|319|332}}
	| EUIndex =
			| PPhrases = {{P-phrases|261|264|271|280|302+352|304+312|304+340|305+351+338|310|312|321|332+313|337+313|362}}
			| ExternalSDS =
	| MainHazards =		| MainHazards =
	| NFPA-H =		| NFPA-H =
	| NFPA-F =		| NFPA-F =
	| NFPA-R =		| NFPA-R =
	| NFPA-O =		| NFPA-S =
	| RPhrases =
	| SPhrases =
	| RSPhrases =
	| FlashPt =		| FlashPt =
	| Autoignition =		| AutoignitionPt =
	| ExploLimits =		| ExploLimits =
	| PEL = }}		| PEL = }}
	| Section8 = {{Chembox Related		|Section8={{Chembox Related
	| OtherAnions =		| OtherAnions =
	| OtherCations =		| OtherCations =
	| OtherFunctn =		| OtherFunction =
	| Function =		| OtherFunction_label =
	| OtherCpds = }}		| OtherCompounds = }}
	}}		}}
	'''Monocalcium aluminate''' (CaAl<sub>2</sub>O<sub>4</sub>) is one of the series of ]<ref>H F W Taylor, ''Cement Chemistry'', Academic Press, 1990, ISBN 0-12-683900-X, p 35</ref>. It does not occur in nature, but is important in the composition of ].		'''Monocalcium aluminate''' (CaAl<sub>2</sub>O<sub>4</sub>) is one of the series of ].<ref>H F W Taylor, ''Cement Chemistry'', Academic Press, 1990, {{ISBN|0-12-683900-X}}, p 35</ref> It does occur in nature, although only very rarely, as two polymorphs known as ] and ], both from meteorites.<ref>{{Cite web|url=https://www.mindat.org/min-30909.html|title = Dmitryivanovite}}</ref><ref>{{Cite web|url=https://www.mindat.org/min-40468.html|title = Krotite}}</ref> It is important in the composition of ].
	==Properties==		==Properties==
	Monocalcium aluminate is formed when the appropriate proportions of ] and ] are heated together until the mixture melts. It melts incongruently at 1390°C. The crystal is ] and ], and has density 2945 kg.m<sup>-3</sup>. In calcium aluminate cements, it exists as a solid solution in which the amount of minor elements depends upon the bulk composition of the ]. A typical composition<ref>P. C. Hewlett (Ed)''Lea's Chemistry of Cement and Concrete: 4th Ed'', Arnold, 1998, ISBN 0-340-56589-6, p715</ref> is Ca<sub>0.93</sub>Al<sub>1.94</sub>Fe<sub>0.11</sub>Si<sub>0.02</sub>O<sub>4</sub>. It reacts rapidly with water, forming the metastable hydrate CaO.Al<sub>2</sub>O<sub>3</sub>.10H<sub>2</sub>O, or a mixture of 2CaO.Al<sub>2</sub>O<sub>3</sub>.8H<sub>2</sub>O, 3CaO.Al<sub>2</sub>O<sub>3</sub>.6H<sub>2</sub>O and Al(OH)<sub>3</sub> gel. These reactions form the first stage of strength development in calcium aluminate cements.		Monocalcium aluminate is formed when the appropriate proportions of ] and ] are heated together until the mixture melts. It ] at 1390&nbsp;°C. The crystal is ] and ], and has density 2945&nbsp;]. In calcium aluminate cements, it exists as a solid solution in which the amount of minor elements depends upon the bulk composition of the ]. A typical composition<ref>P. C. Hewlett (Ed)''Lea's Chemistry of Cement and Concrete: 4th Ed'', Arnold, 1998, {{ISBN|0-340-56589-6}}, p715</ref> is Ca<sub>0.93</sub>Al<sub>1.94</sub>Fe<sub>0.11</sub>Si<sub>0.02</sub>O<sub>4</sub>. It reacts rapidly with water, forming the metastable hydrate CaO·Al<sub>2</sub>O<sub>3</sub>·10H<sub>2</sub>O, or a mixture of 2CaO·Al<sub>2</sub>O<sub>3</sub>·8H<sub>2</sub>O, 3CaO·Al<sub>2</sub>O<sub>3</sub>·6H<sub>2</sub>O and Al(OH)<sub>3</sub> gel. These reactions form the first stage of strength development in calcium aluminate cements.
	==References==		==References==
	<references/>		<references/>
			{{Calcium compounds}}
	]		]