Starkeyite: Difference between revisions

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{{Infobox_Salt
{{Infobox_Salt
|Footnote            = <ref>http://webmineral.com/data/Starkeyite.shtml  viewed on 29/07/2010</ref><ref>http://www.mindat.org/min-3752.html  viewed on 29/07/2010</ref>
|Footnote            = <ref>http://webmineral.com/data/Starkeyite.shtml  viewed on 29/07/2010</ref><ref>http://www.mindat.org/min-3752.html  viewed on 29/07/2010</ref>  
|photo                = <!-- [[Image:"file name"|300px]] -->
|photo                = <!-- [[Image:"file name"|300px]] -->
|mineralogical_Name  = Starkeyite, Leonhardtite
|mineralogical_Name  = Starkeyite, Leonhardtite
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|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
|Hydratforms          = [[Kieserite]] (MgSO<sub>4</sub>•H<sub>2</sub>O)<br>[[Sanderite]] (MgSO<sub>4</sub>•2H<sub>2</sub>O)<br> [[Pentahydrite]] (MgSO<sub>4</sub>•5H<sub>2</sub>O)<br>[[Hexahydrite]] (MgSO<sub>4</sub>•6H<sub>2</sub>O)<br> [[Epsomite]] (MgSO<sub>4</sub>•7H<sub>2</sub>O)<br> [[Meridianite]] (MgSO<sub>4</sub>•11H<sub>2</sub>O)<br> [[Magnesium 12-Hydrate]]
|Hydratforms          = [[Kieserite]] (MgSO<sub>4</sub>•H<sub>2</sub>O)<br>[[Sanderite]] (MgSO<sub>4</sub>•2H<sub>2</sub>O)<br> [[Pentahydrite]] (MgSO<sub>4</sub>•5H<sub>2</sub>O)<br>[[Hexahydrite]] (MgSO<sub>4</sub>•6H<sub>2</sub>O)<br> [[Epsomite]] (MgSO<sub>4</sub>•7H<sub>2</sub>O)<br> [[Meridianiite]] (MgSO<sub>4</sub>•11H<sub>2</sub>O)<br> [[Magnesium 12-Hydrate]]
|Crystal_System      = monoclinic
|Crystal_System      = monoclinic
|Crystal_Structure    =
|Crystal_Structure    =
|Deliqueszenzhumidity =
|Deliqueszenzhumidity =
|Solubility          =
|Solubility          =
|Density              =
|Density              =2.01 g/cm<sup>3</sup>
|MolVolume            = 95.87 cm<sup>3</sup>/mol
|MolVolume            = 95.87 cm<sup>3</sup>/mol
|Molweight            = 192.3 g/mol
|Molweight            = 192.43 g/mol
|Transparency        = translucent to opaque
|Transparency        = translucent to opaque
|Cleavage            =
|Cleavage            =
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|optical_Orientation  = positive
|optical_Orientation  = positive
|Pleochroism          =
|Pleochroism          =
|Dispersion          =
|Dispersion          =22°
|Phase_Transition    =
|Phase_Transition    =
|chemBehavior        =
|chemBehavior        =
|Comments            = not stable in air
|Comments            = unstable in air
|Literature = <bib id="Lide:1995"/> <bib id="Robson:1927"/>
}}
}}


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==Weblinks==
==Weblinks==
<references/>
<references/>


[[Category:Starkeyite]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]][[Category:Sulfate]]
== Literature  ==
 
<biblist/>
 
 
[[Category:Starkeyite]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]][[Category:Sulfate]][[Category:List]]

Latest revision as of 14:53, 25 March 2015

back to Sulfate

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)
Meridianiite (MgSO4•11H2O)
Magnesium 12-Hydrate
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 2.01 g/cm3
Molar volume 95.87 cm3/mol
Molar weight 192.43 g/mol
Transparency translucent to opaque
Cleavage
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments unstable in air
Crystal Optics
Refractive Indices nx = 1.49
ny = 1.491
nz = 1.497
Birefringence Δ = 0.007
Optical Orientation positive
Pleochroism
Dispersion 22°
Used Literature
[Lide:1995]Title: CRC Handbook of Chemistry and Physics
Author: Lide D.R.
Link to Google Scholar
[Robson:1927]Title: The System MgSO4-H2O from 68 to 240°
Author: Robson H.L.
Link to Google Scholar



Weblinks[edit]

Literature[edit]

[Lide:1995]Lide D.R. (eds.) Lide D.R. (1995): CRC Handbook of Chemistry and Physics, CRC PressLink to Google Scholar
[Robson:1927]Robson H.L. (1927): The System MgSO4-H2O from 68 to 240°. In: J. Amer. Chem. Soc., 49 (11), 2772-2783Link to Google Scholar