Darapskite

From Saltwiki
Darapskite[1][2]
Darapskit-19082010-klein.jpg
Mineralogical name Darapskite
Chemical name Trisodiumsulfate nitrate Monohydrate
Trivial name
Chemical formula Na3(SO4)(NO3)•H2O
NaNO3•Na2SO4•H2O
Other forms
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 2.20 g/cm3
Molar volume 111.4 cm3/mol
Molar weight 245.1 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments can be produced from an aqueous solution of Na2SO4 and NaNO3 at 14-50°C
Crystal Optics
Refractive Indices nx = 1.391
ny = 1.481
nz = 1.486
Birefringence Δ = 0.095
Optical Orientation negative
Pleochroism
Dispersion
Used Literature
[JCPDS:1991]Title: JCPDS Powder Diffraction File 2 (PDF-2)
Link to Google Scholar
[Dana:1951]Title: Dana's System of Mineralogy
Author: Dana J.D.
Link to Google Scholar


back to Sulfate

References

Literature

[Dana:1951]Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & SonsLink to Google Scholar
[JCPDS:1991] (1991): JCPDS Powder Diffraction File 2 (PDF-2)Link to Google Scholar