Trona

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Trona<ref>http://webmineral.com/data/Trona.shtml viewed on 09/06/2011</ref><ref>http://www.mindat.org/min-4031.html viewed on 09/06/2011</ref>
Mineralogical name Trona, Tronite
Chemical name Trisodium hydrogen dicarbonate dihydrate; sodium carbonate bicarbonate dihydrate
Trivial name
Chemical formula Na3H(CO3)2•2H2O; Na2CO3•NaHCO3•2H2O
Other forms
Crystal system monoclinic
Crystal structure C2/c
Deliquescence humidity 20°C
Solubility (g/l) at 20°C 130 g/l (0°C)
Density (g/cm³) 2.13 g/cm³
Molar volume
Molar weight 226.03 g/mol
Transparency translucent
Cleavage perfect to indistinct
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments can be produced from an aqueous solution with a high concentration of NaCl and Na2SO4 at 50-85°C
pH about 10
Crystal Optics
Refractive Indices nx = 1.412
ny= 1.492
nz = 1.54
Birefringence Δ = 0.128
Optical Orientation biaxial negative
Pleochroism
Dispersion
Used Literature
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Intoduction

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Literature

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