(Fe, Mg) 2SiO4 occurs in the polymorphic forms of olivine (orthorhombic), wadsleyite
(orthorhombic) and ringwoodite (cubic). These are some of the most common minerals in the …

Hypervelocity impacts are among the fundamental phenomena occurring during the
evolution of the solar system and are characterized by instantaneous ultrahigh pressure and …

The current shock classification scheme of meteorites assigns shock levels of S1
(unshocked) to S6 (very strongly shocked) using shock effects in rock‐forming minerals such …

Heavily shocked meteorites contain various types of high‐pressure polymorphs of major
minerals (olivine, pyroxene, feldspar, and quartz) and accessory minerals (chromite and Ca …

Impacts are central to the origin and evolution of planets of the Solar System. The shapes of
craters, which can reach up to 1,000 km in diameter on the Moon, provide critical information …

Advanced microanalytical techniques such as high‐resolution transmission electron
microscopy (HRTEM), atom probe tomography (APT), and synchrotron‐based scanning …

A dense magnesium iron silicate polymorph with a structure intermediate between olivine,
ringwoodite, and wadsleyite was theoretically predicted about four decades ago. As this …

Shocked meteorites that were formed when their parent body underwent shock
metamorphism often contain the mineral plagioclase either in an amorphous form or in its …

Post-shock annealing of meteorites can destroy their shock-induced features, particularly
high-pressure minerals, and complicate the estimation of impact pressure–temperature …

The fourth installment of the evolutionary system of mineralogy considers two stages of
planetesimal mineralogy that occurred early in the history of the solar nebula, commencing …