Meteorite Glossary - Letter P
Please select a letter to view the meteorite and tektite definitions
Pallasite:
A class of meteorites characterized by a mixture of large olivine crystals in a matrix of nickel iron.
Petrology:
The study of the nature of minerals in rocks, or the minerals which are found in meteorites
Plessite:
A fine grained mixture of taenite and kamacite that often forms triangular fields bordering the taenite and kamacite crystals of octahedrite meteorites. But it is not a mineral itself instead it is made of the other two nickel iron minerals.
Polymorph:
A mineral with the same chemical composition of another but often with a different density and hardness. Often polymorphs in meteorites are formed by high pressure and high temperature. Diamond and graphite are common polymorphs of carbon.
Pyroxene:
A magnesium-iron silicate mineral family but distinct from olivine found in many different forms in meteorites.
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