Thermonatrite: Difference between revisions

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Revision as of 15:07, 20 December 2011

Thermonatrite[1][2]
Mineralogical name Thermonatrite
Chemical name Sodium carbonate hydrate
Trivial name Sodium carbonate
Chemical formula Na2CO3•H2O
Other forms Natrite (Na2CO3)
Sodium carbonate heptahydrate (Na2CO3•7H2O)
Sodium carbonate decahydrate (Na2CO3•10H2O)
Crystal system orthorhombic
Crystal structure
Deliquescence humidity 20°C 71% (35°C)
Solubility (g/l) at 20°C 330 g/l
Density (g/cm³) 2.255 g/cm3
Molar volume 55.11 cm3/mol
Molar weight 124.01 g/mol
Transparency transparent
Cleavage poor to indistinct
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments alkaline in aqueous solution
pH about 12
Crystal Optics
Refractive Indices nx = 1.420
ny= 1.509
nz = 1.525
Birefringence Δ = 0.105
Optical Orientation biaxial negative
Pleochroism
Dispersion
Used Literature
{{{Literature}}}


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