Vestaite

Chemical formula: (Ti⁴⁺Fe²⁺)Ti⁴⁺₃O₉

Westaite is an iron titanium oxide, identified as microscopic inclusions in a stony meteorite.

## Characteristics Westaite is an extremely rare mineral from the oxide group, identified only as microscopic inclusions up to 100 micrometers in size. It was discovered within another mineral, plagioclase, within a basaltic fragment (eucrite) from a meteorite found in Antarctica. Its occurrence is strictly limited to extraterrestrial environments, making it a subject of scientific interest rather than a collectible material in the traditional sense. ## History and Name The mineral was officially approved by the International Mineralogical Association (IMA) in 2017 under number IMA2017-047. Its name comes from the asteroid (4) Vesta, which is considered the probable parent body of HED meteorites (howardites, eucrites, diogenites) in which it was found. The discovery was made by a team of scientists analyzing the composition of the Graves Nunataks 06128 meteorite.

Properties

Crystal system
Monoclinic

Diagnostic features

## Identification Identification of westaite is possible only using advanced laboratory techniques, such as electron microscopy and energy-dispersive spectroscopy (EDS), due to its microscopic size and occurrence as inclusions in other minerals. Visual and physical characteristics cannot be determined with the naked eye.

Geological environment

## Genesis Westaite forms under conditions prevailing within the crust of an asteroid, such as Vesta. Its presence in basaltic eucrites suggests crystallization from magma in an oxygen-poor environment. It is a product of magmatic processes occurring on planetary bodies during the early stages of the Solar System's formation. ## Mineral Associations This mineral occurs in paragenesis with plagioclase (specifically bytownite), pyroxene (pigeonite and augite), ilmenite, chromite, troilite, and other minerals typical of eucritic meteorites. ## Localities The only confirmed locality for westaite is the Graves Nunataks 06128 (GRA 06128) meteorite, found in Antarctica.

Rarity

Extremely rare

For collectors

Westaite is not a collector's mineral. It occurs exclusively as microscopic inclusions in a rare meteorite, available only in scientific institutions for research purposes. There is no market for this mineral, and its value is purely scientific.

Care and storage

## Cleaning Due to its microscopic size and occurrence as inclusions, mechanical cleaning of individual crystals is impossible. A meteorite specimen containing westaite should be cleaned according to the recommendations for stony meteorites, most often dry, using a soft brush. ## What to avoid Avoid all chemicals, ultrasonics, and washing in water, which could damage both the delicate inclusions and the entire meteorite matrix. ## Storage Specimens containing westaite should be stored in stable, dry conditions, preferably in a specialized membrane box or capsule, to protect them from dust, moisture, and mechanical damage.

External references

Sources

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