Chemical compound naturally occurring as the mineral larnite
For the metasilicate, see Calcium metasilicate.
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Calcium silicate
Names
Preferred IUPAC name
Calcium silicate
Systematic IUPAC name
Dicalcium silicate
Other names
Belite
Calcium monosilicate
Calcium hydrosilicate
Calcium metasilicate
Calcium orthosilicate
Micro-cell
Silene
Silicic acid calcium salt
Identifiers
CAS Number
1344-95-2Y
111811-33-7 hydrateY
12168-85-3 calcium oxideY
3D model (JSmol)
Interactive image
ChEBI
CHEBI:190294
ChemSpider
14235N
23811 calcium oxideY
ECHA InfoCard
100.014.282
EC Number
235-336-9
E number
E552 (acidity regulators, ...)
KEGG
D03309N
MeSH
Calcium+silicate
PubChem CID
14941
44154858 hydrate
25523 calcium oxide
UNII
S4255P4G5MY
404G39282C calcium oxideY
CompTox Dashboard (EPA)
DTXSID5049570
InChI
InChI=1S/2Ca.O4Si/c;;1-5(2,3)4/q2*+2;-4N
Key: JHLNERQLKQQLRZ-UHFFFAOYSA-NN
SMILES
[Ca++].[Ca++].[O-][Si]([O-])([O-])[O-]
Properties
Chemical formula
Ca2O4Si
Molar mass
172.237 g·mol−1
Appearance
White crystals
Density
2.9 g/cm3 (solid)[1]
Melting point
2,130[2] °C (3,870 °F; 2,400 K)
Solubility in water
0.01% (20 °C)[1]
Thermochemistry
Std molar entropy (S⦵298)
84 J/(mol·K)[3]
Std enthalpy of formation (ΔfH⦵298)
−1630 kJ/mol[3]
Pharmacology
ATC code
A02AC02 (WHO)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Irritant
NFPA 704 (fire diamond)
2
0
0
Flash point
Not applicable
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)[1]
REL (Recommended)
TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)[1]
IDLH (Immediate danger)
N.D.[1]
Safety data sheet (SDS)
[4]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Nverify (what is YN ?)
Infobox references
Chemical compound
Calcium silicate is the chemical compound Ca2SiO4, also known as calcium orthosilicate and is sometimes formulated as 2CaO·SiO2. It is also referred to by the shortened trade name Cal-Sil or Calsil. It occurs naturally as the mineral larnite.
^ abcdeNIOSH Pocket Guide to Chemical Hazards. "#0094". National Institute for Occupational Safety and Health (NIOSH).
^R. B. Heimann, Classic and Advanced Ceramics: From Fundamentals to Applications, Wiley, 2010 ISBN 352763018X
^ abZumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 978-0-618-94690-7.
^"SDS Sheet Library". BNZ Materials. Archived from the original on 2012-03-04. Retrieved 2017-07-19.
Calciumsilicate is the chemical compound Ca2SiO4, also known as calcium orthosilicate and is sometimes formulated as 2CaO·SiO2. It is also referred to...
Calciumsilicate hydrates (or C-S-H) are the main products of the hydration of Portland cement and are primarily responsible for the strength of cement-based...
with clay they are made with lime binding the silicate material. The raw materials for calcium-silicate bricks include lime mixed in a proportion of about...
When treated with calcium oxides and water, silicate minerals form Portland cement. Equilibria involving hydrolysis of silicate minerals are difficult...
Silicate perovskite is either (Mg,Fe)SiO3 (the magnesium end-member is called bridgmanite) or CaSiO3 (calciumsilicate known as davemaoite) when arranged...
of structural steel and pipes Exfoliated vermiculite is added to a calciumsilicate slurry. This is then dewatered by pressing or by using one of the...
suitable for relatively small flows or less complex acid mine drainage. A calciumsilicate feedstock, made from processed steel slag, can also be used to neutralize...
Bayer process which is often converted to calciumsilicate (Ca2SiO4). The main applications of sodium silicates are in detergents, paper industry (as deinking...
than calcium hydroxide, and indistinguishable from Biodentin. MTA, when mixed with water, forms a calciumsilicate hydrate gel which contains calcium hydroxide...
properties, to a calciumsilicate, with good cementing properties. In chemical terms, the pozzolanic reaction occurs between calcium hydroxide, also known...
precursor in sulfuric acid production. The reaction also produces calciumsilicate, a mineral phase essential in cement clinker production. 2 CaSO4 +...
or Fe(III)). Although aluminium substitutes extensively for silicon in silicates such as feldspars and amphiboles, the substitution occurs only to a limited...
rankinite along with calciumsilicate hydrate phases in lime mortars. The only explanation for the discovery of these silicate phases not normally expected...
Cements used in construction are usually inorganic, often lime or calciumsilicate based, which can be characterized as hydraulic or the less common non-hydraulic...
Egyptian blue, also known as calcium copper silicate (CaCuSi4O10 or CaOCuO(SiO2)4 (calcium copper tetrasilicate)) or cuprorivaite, is a pigment that was...
hyphens in C-S-H indicate a calciumsilicate hydrate phase of variable composition, while 'CSH' would indicate a calciumsilicate phase, CaH2SiO4. The cement...
geologic reservoirs, most commonly in the form of calcium carbonate or as calciumsilicate. Calcium-containing rocks include calcite, dolomite, phosphate...
which consist essentially of hydraulic calciumsilicates, usually containing one or more of the forms of calcium sulfate as an inter ground addition. The...
this by reacting with finely divided silica and alumina to produce calciumsilicates and aluminates, which possess cementing properties. Small quantities...
Tobermorite is a calciumsilicate hydrate mineral with chemical formula: Ca5Si6O16(OH)2·4H2O or Ca5Si6(O,OH)18·5H2O. Two structural varieties are distinguished:...
and silicate. Under influence of carbon dioxide, lime-based binders carbonate and water silicate-based binders solidify. Together they form calcium silicate...
four minerals: two calciumsilicates, alite (Ca3SiO5) and belite (Ca2SiO4), along with tricalcium aluminate (Ca3Al2O6) and calcium aluminoferrite (Ca2(Al...
are natural minerals containing calcium or rare earth elements. However, some have been made experimentally. Silicate carbonate minerals can be formed...
baking, calcium phosphate is used as a leavening agent. Calcium sulfite is used as a bleach in papermaking and as a disinfectant, calciumsilicate is used...
the air and calcium hydroxide and hydrated calciumsilicate in the concrete is known as neutralisation. The similar reaction in which calcium hydroxide...
copper silicate-bicarbonate mineral Iranite (Persian: ایرانیت), a lead copper chromate silicate mineral Kinoite, a copper silicate mineral with calcium Larimar...
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