Darapskite
Jump to navigation
Jump to search
| Darapskite[1][2] | |
| |
| Mineralogical name | Darapskite |
| Chemical name | Trisodiumsulfate nitrate Monohydrate |
| Trivial name | |
| Chemical formula | Na3(SO4)(NO3)•H2O NaNO3•Na2SO4•H2O |
| Other forms | |
| Crystal system | monoclinic |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 2.20 g/cm3 |
| Molar volume | 111.4 cm3/mol |
| Molar weight | 245.1 g/mol |
| Transparency | transparent |
| Cleavage | perfect |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | can be produced from an aqueous solution of Na2SO4 and NaNO3 at 14-50°C |
| Crystal Optics | |
| Refractive Indices | nx = 1.391 ny = 1.481 nz = 1.486 |
| Birefringence | Δ = 0.095 |
| Optical Orientation | negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
[JCPDS:1991]Title: JCPDS Powder Diffraction File 2 (PDF-2) [Dana:1951]Title: Dana's System of MineralogyAuthor: Dana J.D.
| |
back to Sulfate
References[edit]
- ↑ http://webmineral.com/data/Darapskite.shtml viewed on 29/07/2010
- ↑ http://www.mindat.org/min-1226.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). | |