meteoroidide

Meteoroidide is a hypothetical mineralogical term used to refer to a meteoritic‑derived phase that, in speculative models, could form under extreme conditions in meteoroids or during meteorite impacts. The name blends meteoroid with the -ide suffix common to minerals. Meteoroidide has no formal recognition by the International Mineralogical Association, and there are no peer‑reviewed reports of a confirmed meteoroidide specimen. In theoretical discussions, meteoroidide is described as a metallic, iron‑ or nickel‑rich phase that may occur alongside typical meteoritic constituents such as kamacite or troilite, sometimes accompanied by silicate matrices. Isotopic anomalies or trace‑element patterns in meteoroidide are proposed as potential indicators of meteoritic origin.

Potentially, meteoroidide would be found in certain iron meteorites or in layered meteorite fragments where high‑temperature melting and differentiation occurred. It would be sought with standard mineralogical tools: electron microprobe analysis, X‑ray diffraction, transmission electron microscopy, and isotopic measurement, looking for metallic textures and meteoritic isotopic signatures.

Formation scenarios include rapid cooling and crystallization of metal melts produced by solar heating or impact processes in the parent asteroid, or atmospheric fragmentation of a molten meteoroid. If verified, meteoroidide would provide insight into meteoritic formation environments, cooling rates, and diffusion processes under high‑pressure conditions.

See also: meteoritics, mineralogy, kamacite, meteoritic iron. References: None; term remains speculative and not formally adopted.