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Potassium disilicate

Potassium disilicate is an inorganic compound, a salt of potassium and silicic acid with the formula K 2 Si 2 O 5 , colorless crystals, dissolved in water.

Potassium disilicate
General
Systematic
name
Potassium disilicate
Traditional namesPotassium silicate
Chem. formulaK 2 Si 2 O 5
Physical properties
conditioncolorless crystals
Molar mass214.36 g / mol
Density2,456 g / cm³
Thermal properties
T. melt.1015; 1045; 1318 ° C
Optical properties
Refractive index1,500
Classification
Reg. CAS number13637-97-3

Getting

  • Fusion of potash and silicon oxide in stoichiometric amounts:
K2CO3+2SiO2→TK2Si2O5+CO2{\ displaystyle {\ mathsf {K_ {2} CO_ {3} + 2SiO_ {2} \ {\ xrightarrow {T}} \ K_ {2} Si_ {2} O_ {5} + CO_ {2}}}}  

Physical Properties

Potassium disilicate forms colorless hygroscopic crystals of monoclinic syngony , space group C c , cell parameters a = 1.6322 nm, b = 1.1243 nm, c = 0.9919 nm, β = 115.97 °, Z = 12, d = 2.610 g / cm³ (at 150 K).

It is soluble in water.

Literature

  • Handbook of a chemist / Redkoll: B.P. Nikolsky et al. - 3rd ed., Rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.


Source - https://ru.wikipedia.org/w/index.php?title= potassium disilicate&oldid = 80364472


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Clever Geek | 2019