Properties of Kyanite

Kyanite is a mineral that is typically blue, although it can also be colorless, white, gray, green, or yellow. It is an aluminum silicate mineral with the chemical formula Al2SiO5.

Online Metals - High-quality aluminum with fast shipping
Image of kyanite mineral
Credit: Rob Lavinsky, iRocks.com - CC-BY-SA-3.0, via Wikimedia Commons

The following table provides a comprehensive list of kyanite properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).

Note: click on the button to switch between Metric and Imperial units.

Table of Kyanite Properties
Physical Properties
Metric
Chemical FormulaAl2SiO5
Molar Mass162.0456 g/mol
Crystal SystemTriclinic
Mohs Hardness6.3
Density3530 - 3650 kg/m3
ColorBlue, white, yellowish, gray, green, or black
DiaphaneityTranslucent to transparent
LusterVitreous (glassy), pearly
Cleavage(100) perfect, (010) imperfect
FractureUneven, brittle
StreakWhite

Note: unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)

Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017.