Thursday, January 14, 2010

CAI and enstatite chondrite cheat sheet:

On the off chance than anyone else has trouble keeping all these bizarre phases straight…
Corundum: Al2O3
Tistarite: Ti2O3
Perovskite: CaTiO3
Hibbonite: CaAl12O19
Grossite: CaAl4O7
Mellilite: SS between:
Gehlenite Ca2Al2SiO7
Akermanite: Ca2MgSi2O7
Oldhamite: CaS
Larnite: Ca2SiO4
Rankinite: Ca3Si2O7

Albandite MnS
MgS component in Niningerite (along with FeS and albandite)

Daubreelite FeCrS4
Brezinaite Cr3S4

Pyroxene components:
Al-buffonite: (CaMg0.5Ti0.5AlSiO6)
Davisite: Ca(Sc,Ti+++,Mg,Ti++++)AlSiO6

Osbornite TiN
Cohenite Fe3C
Schreibersite: (Fe,Ni)3P

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