Data in this database are freely available under the request of citation of   this paper   and the  paper   in which the data were published.

Hematite

origin	provided by group of Prof. Shkuratov at the University of Kharkov, Ukraine
main constituents	Hematite is an iron oxide, Fe2O3
practical significance	the presence of hematite (Fe2O3) concretions in Mars could imply a water-rich past in the Martian shallow subsurfaceon (Chan et al. 2004). Moreover, hematite is one of the mineral aerosol components that can be found in the Earth’satmosphere (Sokolik et al. 1999).
particle size	measured size distributions Fraunhofer: reff=0.4 μm, veff=0.6
particle shape	irregular
refractive index	estimated to be in the range 3.0 + i[0.01-0.1]
color	dark red
scattering matrix	632.8 nm
article	Muñoz O, Volten H, Hovenier JW, Min M, Shkuratov YG, Jalava JP, van der Zande WJ, Waters LBFM. Experimental and computational study of light scattering by irregular particles with extreme refractive indices: hematite and rutile. Astronomy and Astrophysics, vol. 446, pp. 525–535, 2006 See also: Shkuratov Yu, Ovcharenko A, Zubko E, Volten H, Muñoz O, Videen G. The negative polarization of light scattered from particulate surfaces and of independently scattering particles. Journal of Quantitative Spectroscopy and Radiative Transfer, 88, 267-284 (2004)