Aphthitalite: Difference between revisions

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|Deliqueszenzhumidity =
|Deliqueszenzhumidity =
|Solubility          =
|Solubility          =
|Density              = 2.7 g/cm<sup>3</sup>
|Density              = 1.35 g/cm<sup>3</sup>
|MolVolume            = 246.2 cm<sup>3</sup>/mol
|MolVolume            = 246.2 cm<sup>3</sup>/mol
|Molweight            = 332 g/mol
|Molweight            = 332.41 g/mol
|Transparency        = transparent to opaque
|Transparency        = transparent to opaque
|Cleavage            = imperfect to fair
|Cleavage            = imperfect to fair
|Crystal_Habit        =
|Crystal_Habit        =
|Twinning            =
|Twinning            =
|Refractive_Indices  = n<sub>o</sub> = 1.487-1.491<br> n<sub>e</sub> = 1.492-1.499
|Refractive_Indices  = n<sub>o</sub> = 1.491<br> n<sub>e</sub> = 1.499
|Birefringence        = Δ = 0.005-0.008
|Birefringence        = Δ = 0.008
|optical_Orientation  = positive
|optical_Orientation  = positive
|Pleochroism          =
|Pleochroism          =
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|chemBehavior        =
|chemBehavior        =
|Comments            =
|Comments            =
|Literature =  <bib id="JCPDS:1991"/><bib id="Dana:1951"/>
}}
}}


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back to [[Sulfate]]


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


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

Latest revision as of 16:49, 14 February 2015

Aphthitalite[1][2]
Aphthitalit-19082010-klein.jpg
Mineralogical name Aphthitalite
Chemical name Potassium sodium sulphate
Trivial name Glaserite, Vesuvian Salt
Chemical formula K3Na(SO4)2
Na2SO4•3K2SO4
Other forms
Crystal system trigonal
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 1.35 g/cm3
Molar volume 246.2 cm3/mol
Molar weight 332.41 g/mol
Transparency transparent to opaque
Cleavage imperfect to fair
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices no = 1.491
ne = 1.499
Birefringence Δ = 0.008
Optical Orientation positive
Pleochroism
Dispersion
Used Literature
[JCPDS:1991]Title: JCPDS Powder Diffraction File 2 (PDF-2)
Link to Google Scholar
[Dana:1951]Title: Dana's System of Mineralogy
Author: Dana J.D.
Link to Google Scholar


back to Sulfate

References[edit]

Literature[edit]

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