| Facts and Figures | ||||||
| name of sample | Sahara | |||||
| origin | collected in the Sahara desert | |||||
| main constituents | quartz, clay minerals, calcium carbonate | |||||
| particle size | distributions measured with laser diffraction | |||||
| reff=8.2 micrometer, veff =4.0 | ||||||
| particle shape | irregular (SEM image) | |||||
| refractive index | estimated to be in the range: | |||||
| 1.5-1.7 - i0.001-0.00001 | ||||||
| color | yellow brown powder | |||||
| scattering matrix | from 5-173 degrees scattering angle | |||||
| wavelength | 441.6 nm (figure) | |||||
| 632.8 nm (figure) | ||||||
| article | Scattering matrices of mineral particles at 441.6 nm and 632.8 nm. | |||||
| Volten H, Muņoz O, Rol E, de Haan JF, Vassen W, Hovenier JW, Muinonen K, Nousiainen T. | ||||||
| Journal of Geophysical Research, 106, 17375-17401,2001 | ||||||
