Nitrocalcite: Difference between revisions
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== Phase Diagrams == | |||
[[file:CaN2 a.jpg|thumb|400px|left|'''Abbildung 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|'''Abbildung 2''' The system CaNO<sub>3</sub>/H<sub>2</sub>O between -30°C to (0°C. diagram : M. Steiger]] | |||
==Under the polarising microscope == | ==Under the polarising microscope == | ||
Revision as of 15:24, 26 December 2011
| Nitrocalcite[1] | |
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 | 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 | nx = 1.465 ny = 1.498 nz = 1.504 |
| Birefringence | Δ = 0.039 |
| Optical Orientation | negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
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Phase Diagrams[edit]
Under the polarising microscope[edit]
- Crysallised from a saturated solution with ethanol addition
in simple polarised light
under crossed polarisers
under crossed polarisers and Red I
2_101703-4-6.jpg)
2_101703-4-5.jpg)
2_101703-4-4.jpg)
- Crystallised in a micro climate chamber
in simple polarised light
under crossed polarisers and Red I
2_102003-4MC-0.jpg)
2_102003-4MC-1.jpg)
Weblinks
[edit]
- ↑ http://www.mindat.org/min-2919.html seen on 29.07.2010