Starkeyite: Difference between revisions

Revision as of 14:00, 6 February 2015

Starkeyite^[1]^[2] ^[3]

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)	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	n_x = 1.49 n_y = 1.491 n_z = 1.497
Birefringence	Δ = 0.007
Optical Orientation	positive
Pleochroism
Dispersion
Used Literature
{{{Literature}}}

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@@ Line 1: / Line 1: @@
 {{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> <ref><bib id="Lide:1995"></ref>
 |photo                = <!-- [[Image:"file name"|300px]] -->
 |mineralogical_Name   = Starkeyite, Leonhardtite
@@ Line 11: / Line 11: @@
 |Deliqueszenzhumidity =
 |Solubility           =
-|Density              =
+|Density              =2.01 g/cm<sup>3</sup>
 |MolVolume            = 95.87 cm<sup>3</sup>/mol
-|Molweight            = 192.3 g/mol
+|Molweight            = 192.43 g/mol
 |Transparency         = translucent to opaque
 |Cleavage             =