Nitrocalcite

Nitrocalcite
Mineralogical name	Nitrocalcite
Chemical name	Calcium Nitrate Tetrahydrate
Trivial name	Nitrate of lime
Chemical formula	Ca(NO3)2•4H2O
Other forms
Crystal system	{{{Crystal_System}}}
Crystal structure
Deliquescence humidity 20°C	53,6
Solubility (g/l) at 20°C
Density (g/cm³)	1,82 g/cm3
Molar volume	129,8 cm3/mol
Molar weight	236,16 g/mol
Transparency
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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Under the polarising microscope

• Crysallised from a saturated solution with ethanol addition
• 

  in simple polarised light

• 

  under crossed polarisers

• 

  under crossed polarisers and Red I

• Crystallised in a micro climate chamber
• 

  in simple polarised light

• 

  under crossed polarisers and Red I

A phase is a physically distinctive form of matter and is characterized by having relatively uniform chemical and physical properties.

Light is called polarised, when the oscillation of the light waves has a certain orientation. The electric field may be oriented in a single direction (linear polarization), or it may rotate as the wave travels (circular or elliptical polarization) This can be achieved by using polarising filters. Natural daylight is not polarized.