Astrakanite: Difference between revisions
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{{Infobox_Salt | {{Infobox_Salt | ||
|Footnote = <ref>http://www.mindat.org/min-695.html viewed on 29/07/2010</ref> | |Footnote = <ref>http://www.mindat.org/min-695.html viewed on 29/07/2010</ref> <ref><bib id="JCPDS:1991"></ref> | ||
|photo = [[File:CH GR Berguen EvKirche 0098 01 6 Bb 440um IMG 3337.JPG|300px]] | |photo = [[File:CH GR Berguen EvKirche 0098 01 6 Bb 440um IMG 3337.JPG|300px]] | ||
|mineralogical_Name = Astrakanite, Bloedite | |mineralogical_Name = Astrakanite, Bloedite | ||
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back to [[Sulfate]] | back to [[Sulfate]] | ||
== | ==References== | ||
<references/> | <references/> | ||
[[Category:Astrakanite]][[Category:Sulphate]][[Category:Salt]][[Category:editing]][[Category:Sulfate]] | [[Category:Astrakanite]][[Category:Sulphate]][[Category:Salt]][[Category:editing]][[Category:Sulfate]] | ||
Revision as of 13:11, 6 February 2015
| Astrakanite[1] [2] | |
| |
| Mineralogical name | Astrakanite, Bloedite |
| Chemical name | Sodium magnesium sulfate |
| Trivial name | |
| Chemical formula | Na2Mg(SO4)2•4H2O |
| Other forms | |
| Crystal system | monoclinic |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 2.23 g/cm3 |
| Molar volume | 150.0 cm3/mol |
| Molar weight | 334.48 g/mol |
| Transparency | transparent |
| Cleavage | none observed |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | |
| Crystal Optics | |
| Refractive Indices | nx = 1.483-1.486 ny = 1.486-1.488 nz = 1.487-1.489 |
| Birefringence | Δ = 0.004-0.003 |
| Optical Orientation | biaxial negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
back to Sulfate
References[edit]
- ↑ http://www.mindat.org/min-695.html viewed on 29/07/2010
- ↑ <bib id="JCPDS:1991">