...Alan E. Rubin Abstract A large (290 × 510 μ m) opaque nodule (nodule 1) enclosed in a low-FeO porphyntic olivine chondrule in the Allende CV3 carbonaceous chondrite is comprised of 9 vol% euhedral awaruite, 85 vol% magnetite, 5 vol% pentlandite, and 1 vol% merrillite. The awaruite grains are zoned...

... to contain information that is lacking in the first-order peaks. Based on the second-order carbon peak parameters, we tentatively classify four CV3 chondrites into subtypes, and reclassify another. Peak metamorphic temperatures of the investigated meteorites have been estimated based on the width of the D...

... 3 d garnet-type structure with a = 12.19(1) Å, and Z = 8, and end-member formula of Ca 3 Ti 3+ 2 Si 3 O 12 . Rubinite was identified as micrometer-sized crystals in five refractory Ca,Al-rich inclusions (CAIs) from the CV3 carbonaceous chondrites Allende, Efremovka, and Vigarano. In the Vigarano CAI...

.... The manganiferous orthopyroxene and olivine grew in the Mn-rich rim at elevated temperatures, probably ≥ 1000°C. The apparent absence of other grains of MnO-rich pyroxene and olivine within the opaque silicate matrix and other relatively coarse-grained rims in Allende and other CV3 chondrites attests to the unique...

...Fig. 10. Section of differentiated CV3 chondrite parent body showing approximate location and depth of samples NWA 2364 and NWA 6991 in the undifferentiated chondrite crust (after Elkins-Tanton et al. 2011 ). ...

... of the sapphirine supergroup; burnettite (IMA 2013-054), ideally CaVAlSiO 6 , monoclinic, a member of pyroxene group; paqueite (IMA 2013-053), Ca 3 TiSi 2 (Al 2 ,Ti) 3 O 14 , trigonal, were discovered in a V-rich, fluffy Type A Ca-Al-rich inclusion (CAI) A-WP1 (0.6 × 1 mm) in Allende carbonaceous chondrite CV3...