Aphthitalite
Revision as of 13:08, 6 February 2015 by AmelieStahlbuhk (talk | contribs)
| Aphthitalite[1][2] [3] | |
| |
| 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 = 1.487-1.491 ne = 1.492-1.499 |
| Birefringence | Δ = 0.005-0.008 |
| Optical Orientation | positive |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
back to Sulfate
References[edit]
- ↑ http://webmineral.com/data/Aphthitalite.shtml viewed on 29/07/2010
- ↑ http://www.mindat.org/min-280.html viewed on 29/07/2010
- ↑ <bib id="JCPDS:1991">