Nahcolite

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Nahcolite[1][2] [3]
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) 2.21 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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Weblinks[edit]

  1. http://webmineral.com/data/Nahcolite.shtml viewed on 09/06/2011
  2. http://www.mindat.org/min-2831.html viewed on 09/06/2011
  3. <bib id="Broul.etal:1981">