Nahcolite

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Nahcolite[1][2]
Mineralogical name Sodium hydrogen carbonate
Chemical name Nahcolite
Trivial name
Chemical formula NaHCO3
Other forms
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C 96 g/l
Density (g/cm³) 2,2 g/cm³
Molar volume 37,99 cm3/mol
Molar weight 84,01 g/mol
Transparency transparent to translucent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments pH about 8
Crystal Optics
Refractive Indices nx = 1,376
ny = 1,500
nz = 1,582
Birefringence Δ = 0,206
Optical Orientation biaxial negative
Pleochroism
Dispersion
Used Literature
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