Fine-grained, spinel-rich inclusions (FGIs) are abundant in CV3 chondrites and exhibit textures compositions that consistent with a condensation origin. We have conducted systematic investigation of FGIs from two reduced chondrites, Leoville Efremovka, which has revealed number microscale variations the primary mineralogies nodules, provided further insights into origins FGIs. Nodules individua...

Introduction: In recent years, the calcium-aluminum-rich inclusion (CAI) E60 from the Efremovka reduced CV3 chondrite has been used as an age anchor for the Al-Mg extinct chronometer (t1/2 ~0.73 Ma) since an internal Al-Mg isochron corresponding to a 26Al/27Al ratio of (4.63 ± 0.44) × 10−5 has been determined for it [1] and a highly precise 207Pb-206Pb age of 4567.11 ± 0.16 Ma has also been rep...

Introduction: During an ongoing nanomineralogy investigation of the Allende CV3 meteorite, a new mineral, Ni6(Sn,Ge)(S,Te)2, was identified in fractures in a Type B1 Ca-Al-rich refractory inclusion (CAI) ACM-2, named “butianite”. Synthetic Ni6SnS2 is well known [1]. Presented here is the first natural occurrence of Ni6SnS2, as a new alteration mineral in a CAI from a primitive meteorite. Field-...

The cooling of a melt corresponding to the eutectic between wollastonite (CaSiO3) and diopside (CaMgSi2O6) determines synthesis an interesting example alkali-free bioactive glass, easily converted into glass-ceramics featuring two silicate phases, coupled also with åkermanite (Ca2MgSi2O7), by sinter-crystallization fine glass powders at 1000°C. fabrication scaffolds digital light processing sus...