| Facts and Figures | ||||||
| name of sample | Lokon | |||||
| origin | Lokon volcano on Sulawesi, Indonesia. The particles were collected at a | |||||
| few kilometers from the volcano within 24 hours after a minor eruption. | ||||||
| main constituents | silica glass, plagioclase, magnetite | |||||
| particle size | distributions measured with laser diffraction | |||||
| reff= 7.1 micrometer, veff =2.6 | ||||||
| particle shape | irregular (SEM image) | |||||
| refractive index | estimated to be in the range: | |||||
| 1.5-1.6 - i0.001-0.00001 | ||||||
| color | dark 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 | ||||||
