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Rulon Bearings

Aluminum Hydroxide, Gibbsite, Al(OH)3
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: CAS Number: 21645-51-2

Physical Form: White Amorphous Powder

Key Words: Al(OH)3, Aluminum Hydroxide
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Physical PropertiesMetricEnglishComments
Density 2.42 g/cc0.0874 lb/in³
Molecular Weight 78.004 g/mol78.004 g/mol
 
Chemical PropertiesMetricEnglishComments
Molar Volume 31.956 cc/mol31.956 cc/mol
 
Mechanical PropertiesMetricEnglishComments
Hardness, Mohs 2.5 - 3.52.5 - 3.5
 
Electrical PropertiesMetricEnglishComments
Magnetic Susceptibility -4.30e-7-4.30e-7
 
Thermal PropertiesMetricEnglishComments
Specific Heat Capacity  1.17 J/g-°C
@Temperature 24.9 °C
0.280 BTU/lb-°F
@Temperature 76.7 °F
Calculated
 1.18 J/g-°C
@Temperature 25.0 °C
0.282 BTU/lb-°F
@Temperature 77.0 °F
Crystalline
 1.48 J/g-°C
@Temperature 127 °C
0.354 BTU/lb-°F
@Temperature 260 °F
Calculated
 1.74 J/g-°C
@Temperature 227 °C
0.416 BTU/lb-°F
@Temperature 440 °F
Calculated
Heat of Formation -1293.2 kJ/mol-1293.2 kJ/molCrystalline
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.5681.568na
 1.5681.568nß
 1.587
@Wavelength 435.8 nm
1.587
@Wavelength 435.8 nm
ng
 
Descriptive Properties
BrittlenessTough
Cleavage(001)Perfect
LusterPearly Vitreous
SolubilityInsoluble in H2O; Soluble in Alkaline Solutions and Acid Solutions
SynonymGibbsite

References for this datasheet.

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EINOR2014 / 4155

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