Schönite
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| Schönite[1][2] | |
| 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 | nx = 1.4607 ny = 1.4629 nz = 1.4755 |
| Birefringence | Δ = 0.0148 |
| Optical Orientation | positive |
| Pleochroism | |
| Dispersion | 49.7° |
| Used Literature | |
| [JCPDS:1991]Note: complied by the Joint Committee on Powder Diffraction Standards (JCPDS, Swarthmore, Pennsylvania, USA). Title: JCPDS Powder Diffraction File 2 (PDF-2) Year: 1991  [Dana:1951]Author: Dana J.D.Edition: 7 Editor: Dana E.S. Publisher: Wiley & Sons Title: Dana's System of Mineralogy Volume: 2 Year: 1951
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Weblinks
- ↑ http://webmineral.com/data/Picromerite.shtml viewed on 29/07/2010
- ↑ http://www.mindat.org/min-3206.html viewed on 29/07/2010
Literature
| [Dana:1951] | Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons, %address%, %pages%, %url%, %doi% | |
| [JCPDS:1991] | %author% (1991): JCPDS Powder Diffraction File 2 (PDF-2), %howpublished%, %pages% %url%, %doi% | |