Starkeyite: Difference between revisions

Revision as of 08:37, 10 June 2011

Starkeyite^[1]^[2]

Mineralogical name	Starkeyite, Leonhardtite
Chemical name	Magnesiumsulphate 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	n_x = 1,49 n_y = 1,491 n_z = 1,497
Birefringence	Δ = 0,007
Optical Orientation	positive
Pleochroism
Dispersion
Used Literature
{{{Literature}}}

@@ Line 7: / Line 7: @@
 |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]]
-|Crystal_Class        = monoclinic
+|Crystal_System       = monoclinic
 |Crystal_Structure    =
 |Deliqueszenzhumidity =