Aphthitalite
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| Aphthitalite[1][2] | |
| |
| 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)
| |
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
Literature[edit]
| [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:1951] | Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons | |