Pentahydrite

Pentahydrite
Mineralogical name	Pentahydrite, Allenite
Chemical name	Magnesiumsulfate Pentahydrite
Trivial name
Chemical formula	MgSO4•5H2O
Other forms	Kieserite (MgSO4•H2O) Sanderite (MgSO4•2H2O) Starkeyite (MgSO4•4H2O) Hexahydrite (MgSO4•6H2O) Epsomite (MgSO4•7H2O) Meridianite (MgSO4•11H2O) Magnesium 12-Hydrate
Crystal system	triclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³)	1.9 g/cm3
Molar volume
Molar weight	210.3 g/mol
Transparency
Cleavage
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments	unstable in air
Crystal Optics
Refractive Indices	nx = 1.482 ny = 1.492 nz = 1.493
Birefringence	Δ = 0.011
Optical Orientation	negative
Pleochroism
Dispersion
Used Literature
{{{Literature}}}

back to Sulfate

A phase is a physically distinctive form of matter and is characterized by having relatively uniform chemical and physical properties.