Trona

Trona
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
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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A phase is a physically distinctive form of matter and is characterized by having relatively uniform chemical and physical properties.