Nitrocalcite: Difference between revisions

Revision as of 15:30, 26 December 2011

Nitrocalcite^[1]

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	56.5% (10°C), 53.6% (20°C), 50.5% (25°C)
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	n_x = 1.465 n_y = 1.498 n_z = 1.504
Birefringence	Δ = 0.039
Optical Orientation	negative
Pleochroism
Dispersion
Used Literature
{{{Literature}}}

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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)

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 == Phase Diagrams ==
+[[file:CaN2 a.jpg|thumb|400px|left|'''Figure 1''' Phases in the system CaNO<sub>3</sub>/H<sub>2</sub>O (diagram: Michael Steiger)]]
+[[file:Nikrocalcit T-Mol-klein.jpg|thumb|400px|left|'''Figure 2''' The system CaNO<sub>3</sub>/H<sub>2</sub>O between -30°C to 0°C (diagram : Michael Steiger)]]
-[[file:CaN2 a.jpg|thumb|400px|left|'''Figure 1''' Phases in the system CaNO<sub>3</sub>/H<sub>2</sub>O, diagram: M. Steiger]]
-[[file:Nikrocalcit T-Mol-klein.jpg|thumb|400px|left|'''Figure 2''' The system CaNO<sub>3</sub>/H<sub>2</sub>O between -30°C to 0°C, diagram : M. Steiger]]
 <br clear=all>
 ==Under the polarising microscope  ==
@@ Line 47: / Line 45: @@
 Image: HJS Ca(NO3)2 102003-4MC-1.jpg|under crossed polarisers and Red I
 </gallery>
 == Weblinks<br>  ==
 <references />
 [[Category:Nitrocalcite]][[Category:Nitrate]][[Category:Salt]][[Category:InProgress]]