calcium monosilicide

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|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo = 12013-55-7

| PubChem = 6336872

| ChemSpiderID = 4891865

| EINECS = 234-587-1

| UNNumber = 1405

| StdInChI=1S/Ca.Si

| StdInChIKey = OSMSIOKMMFKNIL-UHFFFAOYSA-N

| SMILES = [Si]=[Ca]

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|Section2={{Chembox Properties

| Formula = CaSi

| MolarMass = 68.164 g/mol{{RubberBible92nd|page=4.55}}

| Appearance =

| Density = 2.39 g/cm³

| MeltingPtC = 1324

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| Section3 = {{Chembox Structure

| Structure_ref ={{cite journal|doi=10.1107/S0365110X67001793|title=Alkaline earth silicides, germanides and stannides with CrB structure type|journal=Acta Crystallographica|volume=22|issue=6|pages=919|year=1967|last1=Rieger|first1=W|last2=Parthé|first2=E|doi-access=free}}

| CrystalStruct = Orthorhombic, oS8,

| SpaceGroup = Cmcm, No. 63

| PointGroup =

| LattConst_a = 0.4545 nm

| LattConst_b = 1.0728 nm

| LattConst_c = 0.389 nm

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| UnitCellVolume =

| UnitCellFormulas = 4

| Coordination =

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| Dipole =

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| Section4 = {{Chembox Hazards

| MainHazards = Flammable gas with water

| GHSPictograms = {{GHS02}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|261}}

| PPhrases = {{P-phrases|231+232|280|370+378|402+404|501}}

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Calcium monosilicide (CaSi) is an inorganic compound, a silicide of calcium. It can be prepared by reacting elemental calcium and silicon at temperatures above 1000 °C.Brauer, Georg (1975) Handbuch der Präparativen Anorganischen Chemie. Stuttgart. Vol. 1. p. 933. {{ISBN|3-432-02328-6}}. It is a Zintl phase, where silicon has oxidation state −2 and covalence 2.