Al2Si2O5(OH)4Triclinic
Kaolinite
Al2Si2O5(OH)4
SilicatesChemical FormulaAl2Si2O5(OH)4
Crystal SystemTriclinic
Mohs Hardness2.5
Specific Gravity2.63
ColorWhite, cream, yellow
LusterDull to earthy
StreakWhite
CleavageOne direction
FractureEarthy
Occurrence
Found in weathered rocks. Principal component of kaolin clay. Used in ceramics and paper.