Moraskoite

Chemical formula: Na₂Mg(PO₄)F

Moraskoite is a rare sodium-magnesium phosphate, discovered in the Morasko meteorite in Poland, forming tiny, colorless crystals.

## Characteristics Moraskoite is a mineral from the phosphate group, identified as a new mineral species in 2013. It occurs as very small, anhedral (lacking proper crystal faces) grains, not exceeding 200 micrometers in size, typically forming aggregates. It is colorless and transparent, with a vitreous luster. Its uniqueness lies in its discovery within another rare mineral, czochralskite, in the Morasko iron meteorite found in Poland. ## Physical Properties Due to the extremely small size of the grains, most physical properties, such as hardness, density, cleavage, or fracture, have not been precisely determined. The mineral is transparent and exhibits a vitreous luster. The streak is white. ## Colors and Varieties Moraskoite is colorless. No varieties have been distinguished. ## History and Name The mineral's name comes from its discovery location – the “Morasko Meteorite” nature reserve in Poznań, where the meteorite containing this mineral was found. It was officially approved by the International Mineralogical Association (IMA) in 2013 (IMA number 2013-084). The discoverers are Polish scientists: Łukasz Karwowski, Andrzej Muszyński, Joachim Kusz, and Ryszard Kryza. ## Uses Moraskoite has no industrial application. Its significance is purely scientific and collector-oriented, as a unique extraterrestrial mineral found in Poland.

Properties

Mohs hardness
4-5
Color
Colorless
Luster
Vitreous
Streak
White
Density
2.925
Cleavage
Rarely observed
Fracture
Irregular/Uneven,Conchoidal
Transparency
Transparent
Crystal system
Orthorhombic

Diagnostic features

## Identification Identification of moraskoite is possible only through advanced laboratory techniques, such as electron microscopy (SEM) with chemical composition analysis (EDS) and X-ray diffraction (XRD). Under collecting or field conditions, it is impossible to identify due to the microscopic size of the grains. ## Distinguishing from Similar Minerals Moraskoite occurs in paragenesis with other rare phosphates in the Morasko meteorite, such as czochralskite, merrillite, and buchwaldite. Distinguishing it from these requires specialized chemical and structural analysis. ## Crystal Forms It forms very fine, irregular (anhedral) grains that occur as inclusions in czochralskite or form intergrowths with it.

Geological environment

## Genesis Moraskoite is a mineral of extraterrestrial origin. It formed as a result of shock metamorphism processes and melting of phosphatic inclusions within the parent asteroid of the Morasko meteorite (IAB-MG class). It crystallized from a phosphate melt under high pressure and temperature conditions that occurred during a cosmic collision. ## Mineral Associations This mineral co-occurs directly with czochralskite, in which it forms inclusions. Other associated minerals in the Morasko meteorite include kamacite, taenite, schreibersite, cohenite, troilite, sphalerite, graphite, merrillite, and buchwaldite. ## Localities The only confirmed locality for moraskoite in the world is the Morasko iron meteorite, found in the “Morasko Meteorite” reserve in Poznań, Poland. This is the type locality for this mineral.

Rarity

Extremely rare

For collectors

## Quality Criteria The quality of a moraskoite specimen is inextricably linked to the quality of the Morasko meteorite fragment in which it is found. Since the mineral is microscopic, its collector value is purely scientific and sentimental. The most valuable samples are those in which the presence of moraskoite has been analytically confirmed, and the meteorite fragment itself is stable and well-preserved. ## Popular Localities The only source of specimens is the type locality – the Morasko meteorite from Poland. Fragments of this meteorite, potentially containing moraskoite, are found in institutional and private collections worldwide.

Care and storage

## Cleaning Specimens containing moraskoite, due to their extreme rarity and microscopic size, should not be cleaned under household conditions. Any interventions should be left to specialists in laboratories. ## What to Avoid Contact with any chemicals, ultrasound, as well as changes in temperature and humidity should be avoided. The parent specimen (meteorite) is susceptible to corrosion in a humid environment. ## Storage Store in stable conditions, preferably in a specialized, airtight container with a desiccant, to protect both moraskoite and the surrounding iron meteorite from degradation. Protect from light and vibrations.

External references

Sources

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