| Identification | More | [Name]
BARIUM SILICATE | [CAS]
13255-26-0 | [Synonyms]
BARIUM METASILICATE
BARIUM SILICATE
BARIUM SILICON OXIDE
silicicacid(h2sio3),bariumsalt(1:1)
Silicicacid,bariumsalt(1:1)
Metasilicic acid barium salt | [EINECS(EC#)]
236-245-7 | [Molecular Formula]
BaO3Si | [MDL Number]
MFCD00014186 | [Molecular Weight]
213.41 | [MOL File]
13255-26-0.mol |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R20/22:Harmful by inhalation and if swallowed . | [Safety Statements ]
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) . | [RIDADR ]
UN1564 | [WGK Germany ]
1
| [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III |
| Hazard Information | Back Directory | [Description]
BaSiO3 is orthorhombic with unit-cell dimensions of
a = 5.6182(5)?, b = 12.445(1), c = 4.5816 ?. It is dimorphic
with α-BaSiO3 stable below about 990°C but forms
β-BaSiO3 above 1000°C. A 1:1 mol ratio of BaO–SiO2
fired at 850°C and 1050°C serves to form the two
dimorphs.
The enthalpy of solution of BaSiO3 in (3.15 mol/dm3
HF + 8.13 mol/dm3 HCl) has been measured. From the
results, the standard molar enthalpy of formation of
BaSiO3 (s) was calculated. The value obtained was
-1606.4±2.6 kJ/mol. | [Chemical Properties]
Colorless powder. Insoluble in water; soluble in acids. | [Preparation]
Bariumsilicate can be prepared by calcining the oxide
with silica, SiO2, at an elevated temperature:
BaO + SiO2 + hea?BaSiO3
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