| Facts and Figures | ||||||
| name of sample | Pinatubo | |||||
| origin | Pinatubo volcano in the Philippines. The particles were produced by crushing | |||||
| larger pieces of debris collected at several kilometers from the volcano. | ||||||
| main constituents | silica glass, plagioclase, amphibole, magnetite | |||||
| particle size | distributions measured with laser diffraction | |||||
| reff= 3.0 micrometer, veff =12.3 | ||||||
| particle shape | irregular (SEM image) | |||||
| refractive index | estimated to be in the range: | |||||
| 1.5-1.6 - i0.001-0.00001 | ||||||
| color | light grey 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 | ||||||
| Experimental determination of the phase function and degree of linear polarization | ||||||
| of El Chichōn and Pinatubo volcanic ashes. | ||||||
| Muņoz O, Volten H, de Haan JF, Vassen W, Hovenier JW. | ||||||
| Journal of Geophysical Research, 107,10.1029/2001JD000983,2002 | ||||||
