Volcanic ash, Pinatubo

Practical significance

Interpretation of remote sensing data. Analogues of other planets' atmospheric dust, and dust in comets, asteroids, and circumstellar shells.

Origin

Pinatubo volcano in the Philippines. The particles were produced by crushing larger pieces of debris collected at several kilometers from the volcano.

Main constituent
Silica glass, plagioclase, amphibole, magnetite
Color
Light gray
Particle size Fraunhofer: reff (μm)
3.0
Particle size Fraunhofer: veff
12.3
Size distribution plot:
Size Distribution Pinatubo
Size distribution table
size_pinatubo.txt
SEM/TEM images:
Pinatubo SEM Image 1
Pinatubo SEM Image 2
All SEM/TEM images (zip file)
sem_pinatubo.zip
Scattering matrix (1) wavelength in nm
441.60 nm
Scattering matrix (1) table
matrix_pinatubo_442nm.txt
Scattering matrix (1) plot:
Scattering matrix elements Pinatubo - 442 nm
Scattering matrix (2) wavelength in nm
632.80 nm
Scattering matrix (2) table
matrix_pinatubo_633nm.txt
Scattering matrix (2) plot:
Scattering matrix elements Pinatubo - 633 nm
Refractive index

Estimated to be in the range [1.5-1.6] + i[0.00001-0.001]44

Angle range (deg)
[5,173]
Reference/s
Volten et al., 2001
Muñoz et al., 2002