Editing Calcium silicate (section)

{{Short description|Chemical compound naturally occurring as the mineral larnite}}
{{for|the metasilicate|Calcium metasilicate}}
{{Chembox
|ImageFile = Ca2SiO4simple.svg
| ImageSize = 
| ImageAlt = 
| IUPACName = 
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 477002240
| PIN = Calcium silicate
| SystematicName = Dicalcium silicate
| OtherNames = {{unbulleted list
| Belite
| Calcium monosilicate
| Calcium hydrosilicate
| Calcium metasilicate
| Calcium orthosilicate
| Micro-cell
| Silene
| Silicic acid calcium salt
}}
|Section1={{Chembox Identifiers
| CASNo = 1344-95-2
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo1 = 111811-33-7
| CASNo1_Comment = hydrate
| CASNo1_Ref = {{cascite|correct|??}}
| CASNo2 = 12168-85-3
| CASNo2_Comment = calcium oxide
| CASNo2_Ref = {{cascite|correct|CAS}}
| PubChem = 14941
| PubChem1 = 44154858
| PubChem1_Comment = hydrate
| PubChem2 = 25523
| PubChem2_Comment = calcium oxide
| ChemSpiderID = 14235
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID1 = 23811
| ChemSpiderID1_Comment = calcium oxide
| ChemSpiderID1_Ref = {{chemspidercite|correct|chemspider}}
| ChEBI = 190294
| UNII = S4255P4G5M
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII1_Ref = {{fdacite|correct|FDA}}
| UNII1 = 404G39282C
| UNII1_Comment = calcium oxide
| EINECS = 235-336-9
| KEGG_Ref = {{keggcite|changed|kegg}}
| KEGG = D03309
| MeSHName = Calcium+silicate
| SMILES = [Ca++].[Ca++].[O-][Si]([O-])([O-])[O-]
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/2Ca.O4Si/c;;1-5(2,3)4/q2*+2;-4
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = JHLNERQLKQQLRZ-UHFFFAOYSA-N}}
|Section2={{Chembox Properties
| Ca=2 | Si=1 | O=4
| Appearance = White crystals
| MeltingPtC = 2130<ref>R. B. Heimann, ''Classic and Advanced Ceramics: From Fundamentals to Applications'', Wiley, 2010 {{ISBN|352763018X}}</ref>
| Solubility = 0.01% (20&nbsp;°C)<ref name=PGCH/>
| Density = 2.9 g/cm<sup>3</sup> (solid)<ref name=PGCH/>
}}
|Section3={{Chembox Structure
| CrystalStruct = 
  }}
|Section5={{Chembox Thermochemistry
| DeltaHf = −1630&nbsp;kJ/mol<ref name=b1>{{cite book| author = Zumdahl, Steven S.|title =Chemical Principles 6th Ed.| publisher = Houghton Mifflin Company| year = 2009| isbn = 978-0-618-94690-7|page=A21}}</ref>
| Entropy = 84&nbsp;J/(mol·K)<ref name=b1 />
 }}
|Section6={{Chembox Pharmacology
| ATCCode_prefix = A02
| ATCCode_suffix = AC02
}}
|Section7={{Chembox Hazards
| ExternalSDS = <ref>{{cite web |url=http://www.bnzmaterials.com/msds/msds218.html |title=SDS Sheet Library |publisher=BNZ Materials |access-date=2017-07-19 |archive-url=https://web.archive.org/web/20120304071621/http://www.bnzmaterials.com/msds/msds218.html |archive-date=2012-03-04 |url-status=dead }}</ref>
| MainHazards = Irritant
| FlashPt = Not applicable
| NFPA-H = 2
| NFPA-F = 0
| NFPA-R = 0 
| PEL = TWA 15 mg/m<sup>3</sup> (total) TWA 5 mg/m<sup>3</sup> (resp)<ref name=PGCH>{{PGCH|0094}}</ref>
| IDLH = N.D.<ref name=PGCH/>
| REL = TWA 10 mg/m<sup>3</sup> (total) TWA 5 mg/m<sup>3</sup> (resp)<ref name=PGCH/>
  }}
|Section8={{Chembox Related
| OtherAnions =
  }}
}}

'''Calcium silicate''' can refer to several silicates of calcium including:
*CaO·SiO<sub>2</sub>, [[wollastonite]] (CaSiO<sub>3</sub>)
*2CaO·SiO<sub>2</sub>, [[larnite]] (Ca<sub>2</sub>SiO<sub>4</sub>)
*3CaO·SiO<sub>2</sub>, [[alite]] or (Ca<sub>3</sub>SiO<sub>5</sub>)
*3CaO·2SiO<sub>2</sub>, (Ca<sub>3</sub>Si<sub>2</sub>O<sub>7</sub>).
This article focuses on Ca<sub>2</sub>SiO<sub>4</sub>, also known as calcium [[orthosilicate]], or by the shortened trade name Cal-Sil/Calsil. All calcium silicates are white free-flowing powders. Being strong, cheap and nontoxic, they are components of important structural materials.