God for us to design products, we are the porters of nature!

Home | Mineral Specimens | Gem materials | Mineral Datum | News | Photos | Contact Us
Welcome to China Neolithic, please login, or click here to register!
Dominant species
+More..
Thenardite
Thenardite
Chemical
Formula
Na2SO4
Species
Sulfates
Crystal
System
Orthorhombic
Mohs
Scale
2-3
Specific
Gravity
2.67-2.7
Color
White, grayish white, yellowish white, reddish white, brownish white
Streak
White
Luster
Vitreous, Resinous
Refractive
Index
n = 1.471 n = 1.477 n = 1.484
Diaphaneity
Transparent, Translucent
Cleavage
PerfectOn perfect; on fair; on incomplete
Fracture
Irregular/Uneven, Hackly
Crystal Habit:Forms crust-like prismatic aggregates on matrix
Geological Setting:Lakes and playas in arid regions; as efflorescences on soils in arid areas, and in caliche. Also occurs around volcanic fumaroles mixed with alkali halides and sulphates and as an incrustation on recent lavas.
Thenardite is an anhydrous sodium sulfate mineral, Na2SO4 which occurs in arid evaporite environments. It also occurs in dry caves and old mine workings as an efflorescence and as a crusty deposit around fumaroles. It occurs in volcanic caves on Mt. Etna, Italy and was named after the French chemist, Louis Jacques Thénard (1777–1826).

Thenardite crystallizes in the orthorhombic system and often forms yellowish, reddish to grey white prismatic crystals although usually in massive crust deposits. Thenardite is fluorescent, white in shortwave and yellow-green in longwave UV radiation.

In humid conditions, thenardite gradually absorbs water and converts to the mineral mirabilite, Na2SO4·10H2O.


Copyright© 1999-2016 ChinaNeolithic.Com Copyright; The people's Republic of ICP registration / license:ICP.14062907