Whewellite

Whewellite
Mineralogical name	Whewellite
Chemical name
Trivial name
Chemical formula	Ca(C2O4)•H2O
Other forms
Crystal system	monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³)	2.21 g/cm³
Molar volume
Molar weight	146.12 g/mol
Transparency	transparent to translucent
Cleavage	very good
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments	insoluble in water
Crystal Optics
Refractive Indices	nx = 1.491 ny = 1.555 nz = 1.650
Birefringence	Δ = 0.159
Optical Orientation
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.