|
|||||
|
|
The first known natural occurrence of calcium monoaluminate,in a calcium‐aluminum‐rich inclusion from the CH chondrite Northwest Africa 470 |
|
| Authors: | Marina A Ivanova Michail I Petaev Glenn J Macpherson Michail A Nazarov Lawrence A Taylor John A Wood |
| Abstract: | Abstract— Natural calcium monoaluminate, CaAl2O4, has been found in a grossite‐rich calcium‐aluminum‐rich inclusion (CAI) from the CH chondrite Northwest Africa 470. The calcium monoaluminate occurs as colorless ～10 μm subhedral grains intergrown with grossite, perovskite, and melilite. Nebular condensation is the most likely origin for the precursor materials of this CAI, but calculations suggest that dust/gas ratios substantially enhanced over solar are required to stabilize CaAl2O4. |
| Keywords: | |