Schönite: Difference between revisions

Revision as of 16:15, 13 February 2015

Schönite^[1]^[2] ^[3]

Mineralogical name	Schoenite, Picromerite
Chemical name	Potassium magnesium sulfate hexahydrate
Trivial name
Chemical formula	K₂Mg(SO₄)₂•6H₂O
Other forms
Crystal system	monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C	250 g/l
Density (g/cm³)	2.03 g/cm³
Molar volume	198.4 cm³/mol
Molar weight	402.72 g/mol
Transparency	transparent
Cleavage	perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices	n_x = 1.4607 n_y = 1.4629 n_z = 1.4755
Birefringence	Δ = 0.0148
Optical Orientation	positive
Pleochroism
Dispersion	49.7°
Used Literature
{{{Literature}}}

back to Sulfate

[Dana:1951]	Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons
[JCPDS:1991]	(1991): JCPDS Powder Diffraction File 2 (PDF-2).

Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons

@@ Line 18: / Line 18: @@
 |Crystal_Habit        =
 |Twinning             =
-|Refractive_Indices   = n<sub>x</sub> = 1.461<br> n<sub>y</sub> = 1.463<br> n<sub>z</sub> = 1.476
+|Refractive_Indices   = n<sub>x</sub> = 1.4607<br> n<sub>y</sub> = 1.4629<br> n<sub>z</sub> = 1.4755
-|Birefringence        = Δ = 0.015
+|Birefringence        = Δ = 0.0148
 |optical_Orientation  = positive
 |Pleochroism          =
-|Dispersion           =
+|Dispersion           =49.7°
 |Phase_Transition     =
 |chemBehavior         =
@@ Line 36: / Line 36: @@
 <biblist />
+<bibprint citation="Dana:1951"/>
 [[Category:Schönite]][[Category:Sulphate]][[Category:Salt]][[Category:InProgress]][[Category:Sulfate]]