Description
Northwest Africa 12333 (NWA 12333)
(Northwest Africa)
Purchased: 2017 Mar 31
Classification: Rumuruti chondrite (R5)
History: Purchased in Erfoud by Pierre-Marie Pelé.
Physical characteristics: Dark stone, partially covered with fusion crust. Cut surface reveals dark interior with small chondrules.
Petrography: Highly recrystallized chondrite with average size plagioclase below 50 μm. Abundant sulfide. Accessory magnetite.
Geochemistry: Olivine Fa39.6±0.4, range Fa39.1-40.1, Cr2O3 in ferroan olivine is 0.0±0.1 wt%, NiO2=0.22±0.20 wt% (n=3). High-Ca pyroxene Fs29.6Wo68.7 (n=1). Chromite Cr#=0.85 (n=1).
Classification: Rumuruti chondrite (R5)
Specimens: 20.83 g and a polished section at CEREGE. Main mass with Pierre-Marie Pelé
