Nitromagnesite: Difference between revisions
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|Crystal_Structure = | |Crystal_Structure = | ||
|Deliqueszenzhumidity = 55.7% | |Deliqueszenzhumidity = 55.7% | ||
|Solubility = | |Solubility = 4.73 mol/kg | ||
|Density = 1.63 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 | ||
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back to [[Nitrate]] | back to [[Nitrate]] | ||
==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|right|500px|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.]] | |||
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==Hygroscopicity== | ==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|right|500px|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.]] | |||
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Revision as of 11:50, 21 December 2015
| Nitromagnesite[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  [Broul.etal:1981]Title: Solubility in organic two component systemsAuthor: Broul M., Nyvlt J.; Soehnel O.
| |
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.
2_S.jpg)
Hygroscopicity[edit]
The phase diagram of the system Mg(NO3)2-H2O is shown in Fig. 2.
2_e.jpg)
| 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]
- ↑ 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, Elsevier | |
| [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. | |