Nitrocalcite: Difference between revisions

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|+''Table 1: Deliquescence humidities of nitrocalcite at different round temperatures <bib id="Steiger etal: 2014"/>''                     
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==Under the polarizing microscope  ==
==Under the polarizing microscope  ==



Revision as of 17:05, 15 February 2015

Nitrocalcite[1]
HJS Ca(NO3)2 101703-10-1.jpg
Mineralogical name Nitrocalcite
Chemical name Calcium Nitrate Tetrahydrate
Trivial name Nitrate of lime
Chemical formula Ca(NO3)2•4H2O
Other forms
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C 53.1% [Steiger etal: 2014]Title: Weathering and Deterioration
Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Link to Google Scholar
Solubility (g/l) at 20°C 2660 g/l
Density (g/cm³) 1.82 g/cm3
Molar volume 129.8 cm3/mol
Molar weight 236.16 g/mol
Transparency transparent
Cleavage
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices nx = 1.465
ny = 1.498
nz = 1.504
Birefringence Δ = 0.039
Optical Orientation negative
Pleochroism
Dispersion
Used Literature


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Phase Diagrams[edit]

Figure 1 Phases in the system CaNO3/H2O (diagram: Michael Steiger)
Figure 2 The system CaNO3/H2O between -30°C to 0°C (diagram : Michael Steiger)


Hygroscopicity[edit]


Table 1: Deliquescence humidities of nitrocalcite 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
63.8%r.h. 58.8%r.h. 53.1%r.h. 46.0%r.h. 35.5%r.h. 21.3%r.h. (Ca(NO3)2•3H2O)


Under the polarizing microscope[edit]

Weblinks
[edit]

Literature[edit]

[Broul.etal:1981]Elsevier (eds.) Broul M., Nyvlt J.; Soehnel O. (1981): Solubility in organic two component systems, ElsevierLink 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_4.Link to Google Scholar