Data in this database are freely available under the request of citation of   this paper   and the  paper   in which the data were published.
Montmorillonite
origin clay mineral commercially available from WARD's Science, USA
main constituent aluminium-rich clay mineral
practical significance early choices of Earth spectral analogs showed a predominantly montmorillonite composition since its reflectance spectra in the VIS and NIR are similar to the Martian spectra (Toon et al. 1977)
particle size measured size distributions
Mie: reff=2.8 μm, veff=1.2
Fraunhofer: reff=1.8 μm, veff=1.6
particle shape irregular
refractive index 1.52 + i0.0001 (488nm) (Sokolik and Toon 1999)
color light gray
scattering matrix 488 nm
article Dabrowska DD, Muñoz O, Moreno F, Ramos JL, Martínez-Frías J, Gerhard W. . Scattering matrices of Martian dust analogs 488 nm and 647 nm. Icarus, vol. 250, pp. 83-94, 2015