Nitromagnesite: Difference between revisions

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{{Infobox_Salt
{{Infobox_Salt
|Footnote            = <ref>http://www.mindat.org/min-2920.html seen on 29.07.2010</ref>
|Footnote            = <ref>http://www.mindat.org/min-2920.html seen on 29.07.2010</ref>  
|photo                = [[File:Mg-NO3-2 (1).jpg|300px]]
|photo                = [[File:Mg-NO3-2 (1).jpg|300px]]
|mineralogical_Name  = Nitromagnesite
|mineralogical_Name  = Nitromagnesite
Line 9: Line 9:
|Crystal_System      = monoclinic
|Crystal_System      = monoclinic
|Crystal_Structure    =
|Crystal_Structure    =
|Deliqueszenzhumidity = 57.4% (10°C), 54.4 (20°C), 51.4% (30°C)
|Deliqueszenzhumidity = 55.7%  
|Solubility          = 705 g/l
|Solubility          = 4.73 mol/kg
|Density              = 1.58 g/cm<sup>3</sup>
|Density              = 1.63 g/cm<sup>3</sup>
|MolVolume            = 157.7 cm<sup>3</sup>/mol  
|MolVolume            = 157.7 cm<sup>3</sup>/mol  
|Molweight            = 256.43 g/mol  
|Molweight            = 256.41 g/mol  
|Transparency        = transparent
|Transparency        = transparent
|Cleavage            = perfect
|Cleavage            = perfect
Line 26: Line 26:
|chemBehavior        = soluble in alcohol
|chemBehavior        = soluble in alcohol
|Comments            =
|Comments            =
|Literature          = <bib id="Steiger.etal:2014"/><bib id="Broul.etal:1981"/>
}}
}}


back to [[Nitrate]]
back to [[Nitrate]]


== Weblinks<br>  ==
==Solubility==
Nitromagnesite has got a solubility of 4.7 mol/kg (at 20 °C). The solubility of nitromagnesite and other phases of the system Mg(NO<sub>3</sub>)<sub>2</sub>-H<sub>2</sub>O is shown in Fig. 1.
 
<br>
 
[[Image:Mg(NO3)2 S.jpg|thumb|left|800px|Figure 1: Solubility of magnesium nitrate in water. The molality ''m'' [n(Mg(NO<sub>3</sub>)<sub>2</sub>)•kg(H<sub>2</sub>O)<sup>-1</sup>] is plotted versus the temperature.]]
<br clear=all>
 
==Hygroscopicity==
 
The phase diagram of the system Mg(NO<sub>3</sub>)<sub>2</sub>-H<sub>2</sub>O is shown in Fig. 2.<br>
 
[[Image:D Mg(NO3)2 e.jpg|thumb|left|800px|Figure 1: Phase diagram of the system Mg(NO<sub>3</sub>)<sub>2</sub>-H<sub>2</sub>O. The water activity ''a<sub>w</sub>'' is plotted versus is plotted versus the temperature.]]
<br clear=all>
 
<br clear=all>
{|border="2" cellspacing="0" cellpadding="4" width="52%" align="left" class="wikitable"
|+''Table 1: Deliquescence humidities of nitromagnesite at different round temperatures <bib id="Steiger.etal:2014"/>''                   
|-
|bgcolor = "#F0F0F0" align=center| 0°C
|bgcolor = "#F0F0F0" align=center| 10°C
|bgcolor = "#F0F0F0" align=center| 20°C
|bgcolor = "#F0F0F0" align=center| 30°C
|bgcolor = "#F0F0F0" align=center| 40°C
|bgcolor = "#F0F0F0" align=center| 50°C
|-
|bgcolor = "#FFFFEO" align=center| 61.3%r.h.
|bgcolor = "#FFFFEO" align=center| 58.6%r.h.
|bgcolor = "#FFFFEO" align=center| 55.7%r.h.
|bgcolor = "#FFFFEO" align=center| 52.5%r.h.
|bgcolor = "#FFFFEO" align=center| 49.2%r.h.
|bgcolor = "#FFFFEO" align=center| 45.7%r.h.
|}
<br clear=all>
 
== References ==


<references/>
<references/>
[[Category:Nitromagnesite]][[Category:Nitrate]][[Category:Salt]][[Category:InProgress]]
 
== Literature ==
 
<biblist/>
 
[[Category:Nitromagnesite]][[Category:Nitrate]][[Category:Salt]][[Category:InProgress]][[Category:List]]

Latest revision as of 11:50, 3 May 2023

Nitromagnesite[1]
Mg-NO3-2 (1).jpg
Mineralogical name Nitromagnesite
Chemical name Magnesium Nitrate Hexahydrate
Trivial name
Chemical formula Mg(NO3)2•6H2O
Other forms
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C 55.7%
Solubility (g/l) at 20°C 4.73 mol/kg
Density (g/cm³) 1.63 g/cm3
Molar volume 157.7 cm3/mol
Molar weight 256.41 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior soluble in alcohol
Comments
Crystal Optics
Refractive Indices nx = 1.34
ny = 1.506
nz = 1.506
Birefringence Δ = 0.166
Optical Orientation negative
Pleochroism
Dispersion
Used Literature
[Steiger.etal:2014]Title: Weathering and Deterioration
Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Link to Google Scholar[Broul.etal:1981]Title: Solubility in organic two component systems
Author: Broul M., Nyvlt J.; Soehnel O.
Link to Google Scholar


back to Nitrate

Solubility[edit]

Nitromagnesite has got a solubility of 4.7 mol/kg (at 20 °C). The solubility of nitromagnesite and other phases of the system Mg(NO3)2-H2O is shown in Fig. 1.


Figure 1: Solubility of magnesium nitrate in water. The molality m [n(Mg(NO3)2)•kg(H2O)-1] is plotted versus the temperature.


Hygroscopicity[edit]

The phase diagram of the system Mg(NO3)2-H2O is shown in Fig. 2.

Figure 1: Phase diagram of the system Mg(NO3)2-H2O. The water activity aw is plotted versus is plotted versus the temperature.



Table 1: Deliquescence humidities of nitromagnesite 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
61.3%r.h. 58.6%r.h. 55.7%r.h. 52.5%r.h. 49.2%r.h. 45.7%r.h.


References[edit]

  1. ↑ http://www.mindat.org/min-2920.html seen on 29.07.2010

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

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

concentration given as amount of substance (mol) of the dissolved substance per kilogram solvent; unit: mol•kg-1.

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