New England Meteoritical Services

Everything about meteorites!


Learn about meteorites. Did you find one?

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Allende, carbonaceous chondrite, CV3, full slice, 28.33 grams

The Allende meteorite is a stony fragment of a primitive asteroid that never became hot enough to melt and differentiate. Its primary structures and chemistry are a preserved record of the dust and local environment present in the solar protoplanetary disc when it formed.

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Allende, CV3, carbonaceous chondrite, 28.33 grams, fusion crusted full slice.

It fell over the Mexican state of Chihuahua on February 8, 1969, at 01:05 local time (07:05 GMT) and is the largest carbonaceous chondrite ever found on Earth.

Carbonaceous chondrites have varying but near solar nonvolatile chemical compositions. They contain carbon in the range 0-4 weight percent (wt. %) as well as water/OH (0-13 wt.% in hydrated minerals) and all other biogenic elements (e.g., nitrogen, phosphorous, sulfur). They also contain presolar minerals that were not formed in our solar system. These include moissanite and tiny nanodiamonds.

These minerals provide insights into processes occurring in other stellar environments prior to the formation of our solar system.

The above specimen of Allende contains an abundance of primary structures - Calcium aluminum inclusions (CAI's) with interstellar grains, chondrules, refractory and ultrarefractory inclusions. Carbonaceous chondrites also contain carbonates, graphites, and organic compounds such as amino acids.

Each specimen of Allende is a whole classroom of study material and is often times the centerpiece of a meteorite collection..

This specimen is available for purchase, see Allende Listing

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Examiners and Appraisers of the Historic "Huss - Nininger Collection of Meteorites and Tektites"

Member - Meteoritical Society

Online since 1994