Nitronatrite

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Authtor: Hans-Jürgen schwarz
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Nitronatrite[1][2]
NaNO3 II (1).JPG
Mineralogical name Sodium Nitrate
Chemical name Natriumnitrat
Trivial name Nitratine, Nitratite, Soda Niter, Cubic Niter
Chemical formula NaNO3
Other forms
Crystal system trigonal
Crystal structure
Deliquescence humidity 20°C 75.3%
Solubility (g/l) at 20°C 10.347 mol/kg
Density (g/cm³) 2.26 g/cm3
Molar volume 37.6 cm3/mol
Molar weight 84.99 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices no = 1.587
ne = 1.336
Birefringence Δ = 0.251
Optical Orientation
Pleochroism
Dispersion
Used Literature
[Steiger.etal:2014]Title: Weathering and Deterioration
Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Link to Google Scholar
[Robie.etal:1978]Title: Thermodynamic properties of minerals and related substances at 298.15 K and 1 bar pressure and higher temperatures
Author: Robie R.A., Hemingway B.S.; Fisher J.A.
Link to Google Scholar



Solubility properties

Figure 1: Solubility of NaNO3 in water. The molality m [n(NaNO3)•kg(H2O)-1] is plotted versus the temperature.

Hygroscopicity

Figure 2: Deliquescence behaviour of sodium nitrate. The water activity aw is plotted versus the temperature.


Table 1: Deliquescence humdities of sodium nitrate at different round temperatures [Steiger.etal:2014]Title: Weathering and Deterioration
Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Link to Google Scholar
.
0°C 10°C 20°C 30°C 40°C 50°C
80.1%r.h. 77.7%r.h. 75.3%r.h. 72.8%r.h. 70.4%r.h. 68.0%r.h.


Under the polarizing microscope

Weblinks

Literature

[Robie.etal:1978]Robie R.A., Hemingway B.S.; Fisher J.A. (1978): Thermodynamic properties of minerals and related substances at 298.15 K and 1 bar pressure and higher temperatures. U.S. Geol. Surv. Bull, 1452 ()Link to Google Scholar
[Steiger.etal:2014]Steiger, Michael; Charola A. Elena; Sterflinger, Katja (2014): Weathering and Deterioration. In: Siegesmund S.; Snethlage R. (eds.): Stone in Architecture, Springer Verlag Berlin Heidelberg, 223-316, 10.1007/978-3-642-45155-3_4Link to Google Scholar