Calcite

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Calcite[1][2]
Calcit Kristalle Musterplatte.jpg
Mineralogical name Calcite
Chemical name Calcium carbonate
Trivial name Calc spar
Chemical formula CaCO3
Other forms CaCO3•H2O
CaCO3•6H2O
Crystal system trigonal
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C 0,014 g/l (25°C)
Density (g/cm³) 2,72 g/cm3
Molar volume
Molar weight 100,09 g/mol
Transparency transparent to opaque
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments well soluble in 2M HCl
Crystal Optics
Refractive Indices no = 1,658
ne = 1,486
Birefringence Δ = 0,172
Optical Orientation negative
Pleochroism
Dispersion
Used Literature
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