Properties of Prehnite

Prehnite is a mineral that belongs to the phyllosilicate group. It is typically found in shades of green, ranging from pale to dark green, and may display a pearly or vitreous luster.

Image of prehnite mineral
Credit: Rob Lavinsky, iRocks.com - CC-BY-SA-3.0, via Wikimedia Commons

The following table provides a comprehensive list of prehnite 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.

Table of Prehnite Properties
Physical Properties
Metric
Chemical FormulaCa2Al2Si3O10(OH)2
Crystal SystemOrthorhombic
Mohs Hardness6 - 6.5
Density2800 - 2950 kg/m3
ColorColorless to gray to yellow, yellow-green or white
DiaphaneitySemi-transparent to translucent
LusterVitreous, pearly
Cleavage[001] distinct
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.