Volcanic ash, Lokon

Practical significance

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

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 constituent
Silica glass, plagioclase, magnetite
Color
Dark brown
Particle size Fraunhofer: reff (μm)
7.1
Particle size Fraunhofer: veff
2.6
Size distribution plot:
Size Distribution Lokon
Size distribution table
size_lokon.txt
SEM/TEM images:
Lokon SEM Image 1
Lokon SEM Image 2
All SEM/TEM images (zip file)
sem_lokon.zip
Scattering matrix (1) wavelength in nm
441.60 nm
Scattering matrix (1) table
matrix_lokon_442nm.txt
Scattering matrix (1) plot:
Scattering matrix elements Lokon - 442 nm
Scattering matrix (2) wavelength in nm
632.80 nm
Scattering matrix (2) table
matrix_lokon_442nm_0.txt
Scattering matrix (2) plot:
Scattering matrix elements Lokon - 633 nm
Refractive index

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

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