Boussingaultite

Boussingaultite
Mineralogical name	Boussingaultite
Chemical name	Magnesium ammonium sulfate
Trivial name
Chemical formula	(NH4)2Mg(SO4)2•6H2O
Other forms
Crystal system	monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C	159 g/l (0°C), 1300 g/l (100°C)
Density (g/cm³)	1.72 g/cm3
Molar volume	209.3 cm3/mol
Molar weight	360.63 g/mol
Transparency	transparent
Cleavage	perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices	nx = 1.472 ny = 1.473 nz = 1.479
Birefringence	Δ = 0.007
Optical Orientation	biaxial positive
Pleochroism
Dispersion
Used Literature
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A phase is a physically distinctive form of matter and is characterized by having relatively uniform chemical and physical properties.