Properties of Orthoclase
Orthoclase is a common feldspar mineral, which is a group of rock-forming minerals that make up a significant portion of the Earth's crust. Orthoclase specifically belongs to the potassium feldspar subgroup.
The following table provides a comprehensive list of orthoclase properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Note: click on the icon to switch between Metric and Imperial units.
Physical Properties | Metric |
---|---|
Chemical Formula | KAlSi3O8 |
Molar Mass | 278.33 g/mol |
Crystal System | Monoclinic |
Mohs Hardness | 6 |
Density | 2500 - 2630 kg/m3 |
Color | White, pink, yellow, or red |
Diaphaneity | Transparent to translucent |
Luster | Pearly, vitreous (glassy) |
Cleavage | (001) perfect, (010) good, (110) poor |
Fracture | Uneven |
Streak | White |
Electrical Properties | Metric |
Relative Permittivity (εr) | 6.2 |
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.