Pinatubo volcano in the Philippines. The particles were produced by crushing larger pieces of debris collected at several kilometers from the volcano
interpretation of remote sensing data. Analogues of other planets' atmospheric dust, and dust in comets, asteroids, and circumstellar shells
irregular
estimated to be in the range [1.5-1.6] + i[0.00001-0.001]44
Volten H, Muñoz O, Rol E, de Haan JF, Vassena W, Hovenier JW. Scattering matrices of mineral aerosol particles at 441.6 nm and 632.8 nm. Journal of Geophysical Research, 106, no. D15, pp. 17,375-17,401, 2001
Muñoz O, Volten H, de Haan JF, Vassen W, Hovenier JW. Experimental determination of the phase function and degree of linear polarization of El Chichón and Pinatubo volcanic ashes. Journal of Geophysical Research, vol. 107, no. D13, 4174, 10.1029/2001JD000983, 2002