Printed from https://www.webqc.org

Properties of Sio2

Properties of SiO2 (Silicon dioxide):

Compound NameSilicon dioxide
Chemical FormulaSiO2
Molar Mass60.0843 g/mol
Physical properties
AppearanceTransparent or white
Density2.6480 g/cm³
Helium 0.0001786
Iridium 22.562
Melting1,713.00 °C
Helium -270.973
Hafnium carbide 3958
Boiling2,950.00 °C
Helium -268.928
Tungsten carbide 6000
Thermochemistry
Enthalpy of Formation-911.00 kJ/mol
Adipic acid -994.3
Tricarbon 820.06
Standard Entropy42.00 J/(mol·K)
Ruthenium(III) iodide -247
Chlordecone 764

Alternative Names

Quartz
Silica
Silicic oxide
Silicon(IV) oxide
Crystalline silica
Pure Silica
Silicea
Silica sand

Elemental composition of SiO2
ElementSymbolAtomic weightAtomsMass percent
SiliconSi28.0855146.7435
OxygenO15.9994253.2565
Mass Percent CompositionAtomic Percent Composition
Si: 46.74%O: 53.26%
Si Silicon (46.74%)
O Oxygen (53.26%)
Si: 33.33%O: 66.67%
Si Silicon (33.33%)
O Oxygen (66.67%)
Mass Percent Composition
Si: 46.74%O: 53.26%
Si Silicon (46.74%)
O Oxygen (53.26%)
Atomic Percent Composition
Si: 33.33%O: 66.67%
Si Silicon (33.33%)
O Oxygen (66.67%)
Identifiers
CAS Number7631-86-9
Hill formulaO2Si

Related compounds
FormulaCompound name
SiOSilicon monoxide

Sample reactions for SiO2
EquationReaction type
SiO2 + HF = SiF4 + H2Odouble replacement
Ca3(PO4)2 + SiO2 = P4O10 + CaSiO3double replacement
SiO2 + C = SiC + COdouble replacement
SiO2 + C = Si + COsingle replacement
SiO2 + Mg = Si + MgOsingle replacement

Related
Molecular weight calculator
Oxidation state calculator

Chemical Compound Properties Database

This database contains physical properties and alternative names for thousands of chemical compounds. In chemical formula you may use:
  • Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
  • Functional groups: D, T, Ph, Me, Et, Bu, AcAc, For, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
  • parenthesis () or brackets [].
  • Common compound names.
Examples: H2O, CO2, CH4, NH3, NaCl, CaCO3, H2SO4, C6H12O6, water, carbon dioxide, methane, ammonia, sodium chloride, calcium carbonate, sulfuric acid, glucose.

The database includes melting points, boiling points, densities, and alternative names collected from various chemical sources.

What are compound properties?

Chemical compound properties include physical characteristics such as melting point, boiling point, and density, which are important for chemical identification and applications. Alternative names help identify the same compound when referenced by different naming conventions.

How to use this tool?

Enter a chemical formula (like H2O) or compound name (like water) to look up available properties and alternative names. The tool will search through the database and display any available physical properties and known alternative names for the compound.
Please let us know how we can improve this web app.
Menu Balance Molar mass Gas laws Units Chemistry tools Periodic table Chemical forum Symmetry Constants Contribute Contact us
How to cite?
Choose languageDeutschEnglishEspañolFrançaisItalianoNederlandsPolskiPortuguêsРусский中文日本語한국어