Compositional characterisation of the Themis family

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Table 2

Standards used in the modelling procedure.

Component	Category	Chemical formula	Wavelength range	Type of data^*	Reference
			(μm)

Amorphous olivine	Silicate	Mg_2xFe_2−2xSiO₄	0.3−2.5, 8.0−13.0	OC	Dorschner et al. (1995)
Amorphous pyroxene	–”–	Mg_xFe_1−xSiO₃	0.3−2.5, 8.0−13.0	OC	Dorschner et al. (1995)
Crystalline forsterite	–”–	Mg₂SiO₄	0.3−2.5	OC	Lucey (1998)
–”–	–”–	–”–	8.0−13.0	MAC	Koike et al. (2006)
Crystalline fayalite	–”–	Fe₂SiO₄	8.0−13.0	MAC	Koike et al. (2006)
Crystalline enstatite	–”–	MgSiO₃	0.3−2.5	OC	Lucey (1998)
–”–	–”–	–”–	8.0−13.0	OC	Zeidler et al. (2015)
Crystalline diopside	–”–	CaMgSi₂O₆	8.0−13.0	MAC	Koike et al. (2000)
Pyrrhotite	Sulfide	Fe_1−xS (0 <x< 0.2)	0.3−2.5	RS	USGS^**
Troilite	–”–	FeS	0.3−2.5	OC	Semenov et al. (2003)
Iron	Metal	Fe	0.3−2.5	OC	Semenov et al. (2003)
Amorphous carbon	Carbon	C	0.3−2.5	OC	Zubko et al. (1996)

Notes.

^(*)

OC = optical constants (n and k); MAC = mass absorption coefficient (κ); RS = reflectance spectrum (when OC not available).

^(**)

http://speclab.cr.usgs.gov

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