Starkeyite: Difference between revisions
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|photo = <!-- [[Image:"file name"|300px]] --> | |photo = <!-- [[Image:"file name"|300px]] --> | ||
|mineralogical_Name = Starkeyite, Leonhardtite | |mineralogical_Name = Starkeyite, Leonhardtite | ||
|chemical_Name = | |chemical_Name = Magnesiumsulfate Tetrahydrate | ||
|Trivial_Name = | |Trivial_Name = | ||
|chemical_Formula = MgSO<sub>4</sub>•4H<sub>2</sub>O | |chemical_Formula = MgSO<sub>4</sub>•4H<sub>2</sub>O | ||
| Line 12: | Line 12: | ||
|Solubility = | |Solubility = | ||
|Density = | |Density = | ||
|MolVolume = 95 | |MolVolume = 95.87 cm<sup>3</sup>/mol | ||
|Molweight = 192 | |Molweight = 192.3 g/mol | ||
|Transparency = translucent to opaque | |Transparency = translucent to opaque | ||
|Cleavage = | |Cleavage = | ||
|Crystal_Habit = | |Crystal_Habit = | ||
|Twinning = | |Twinning = | ||
|Refractive_Indices = n<sub>x</sub> = 1 | |Refractive_Indices = n<sub>x</sub> = 1.49<br> n<sub>y</sub> = 1.491<br> n<sub>z</sub> = 1.497 | ||
|Birefringence = Δ = 0 | |Birefringence = Δ = 0.007 | ||
|optical_Orientation = positive | |optical_Orientation = positive | ||
|Pleochroism = | |Pleochroism = | ||
| Line 28: | Line 28: | ||
}} | }} | ||
back to [[ | back to [[Sulfate]] | ||
==Weblinks== | ==Weblinks== | ||
<references/> | <references/> | ||
[[Category:Starkeyite]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]] | [[Category:Starkeyite]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]][[Category:Sulfate]] | ||
Revision as of 16:06, 20 December 2011
| Starkeyite[1][2] | |
| Mineralogical name | Starkeyite, Leonhardtite |
| Chemical name | Magnesiumsulfate Tetrahydrate |
| Trivial name | |
| Chemical formula | MgSO4•4H2O |
| Other forms | Kieserite (MgSO4•H2O) Sanderite (MgSO4•2H2O) Pentahydrite (MgSO4•5H2O) Hexahydrite (MgSO4•6H2O) Epsomite (MgSO4•7H2O) Meridianite (MgSO4•11H2O) Magnesium 12-Hydrate |
| Crystal system | monoclinic |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | |
| Molar volume | 95.87 cm3/mol |
| Molar weight | 192.3 g/mol |
| Transparency | translucent to opaque |
| Cleavage | |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | not stable in air |
| Crystal Optics | |
| Refractive Indices | nx = 1.49 ny = 1.491 nz = 1.497 |
| Birefringence | Δ = 0.007 |
| Optical Orientation | positive |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
back to Sulfate
Weblinks[edit]
- ↑ http://webmineral.com/data/Starkeyite.shtml viewed on 29/07/2010
- ↑ http://www.mindat.org/min-3752.html viewed on 29/07/2010