Michalskiite

Chemical formula: Cu²⁺Mg₃Fe³⁺₃.₃₃(V⁵⁺O₄)₆

Michalskiite is a rare copper, magnesium, and iron vanadate, distinguished by its brownish-red color and the formation of tabular crystals.

## Characteristics Michalskiite is a very rare mineral from the vanadate group, with a complex chemical composition including copper, magnesium, and iron. It occurs as very small, tabular or bladed crystals, which rarely exceed fractions of a millimeter. Its characteristic feature is an intense, brownish-red color. The crystals are transparent and exhibit a vitreous luster. ## Physical Properties This mineral is characterized by a hardness of 3.5 on the Mohs scale, making it relatively soft. Its density is approximately 3.85 g/cm³. It possesses perfect cleavage in one direction, which is evident in its tabular structure. ## Colors and Varieties Michalskiite occurs in a uniform, brownish-red color. Due to its extreme rarity, no color varieties or commercial forms have been described. ## History and Name The mineral was officially recognized by the International Mineralogical Association (IMA) in 2022. Its name honors Tadeusz Michalski (born 1956), a Polish mineral collector from Sosnowiec, who is a specialist in ore minerals and was the first to find the type material of this mineral. It was discovered on the Lichtenberg Absetzer dump in Thuringia, Germany.

Properties

Mohs hardness
3.5
Luster
Vitreous
Streak
Light orange
Density
3.848
Cleavage
Very good on {001}
Transparency
Transparent
Crystal system
Orthorhombic

Diagnostic features

## Identification Identification of michalskiite is based on its unique physical characteristics at the micro scale. Key features include its brownish-red color, tabular shape of very small crystals, vitreous luster, and occurrence in a specific geological environment. Final identification requires advanced analytical methods, such as Raman spectroscopy or EDS analysis. ## Differentiation from Similar Minerals Due to its unique appearance and extreme rarity, it is unlikely to be confused with common minerals. Within the paragenesis of a uranium-vanadium deposit, it might be confused with other rare, colored vanadates. Differentiation requires specialized studies. ## Crystal Forms Michalskiite forms very fine, thin, tabular or bladed crystals, often grouped into small aggregates. The crystals crystallize in the orthorhombic system.

Geological environment

## Genesis Michalskiite is a secondary mineral that forms in the oxidation zones of polymetallic deposits, particularly sedimentary uranium-vanadium deposits. It forms as a result of the weathering of primary ore minerals in the presence of vanadium, copper, magnesium, and iron. ## Mineral Associations At the type locality (Lichtenberg, Germany), it co-occurs with other rare secondary minerals such as schindlerite, strelkinite, carnotite, as well as gypsum, quartz, and clay minerals. ## Localities The only confirmed locality of michalskiite in the world is its type locality: the Lichtenberg Absetzer mine dump, near Ronneburg, in the Greiz district, Thuringia, Germany. This is an area of former uranium mining.

Rarity

Extremely rare

For collectors

## Quality Criteria As a "micromount" type mineral, the collectible value of a specimen depends on the size and development of the crystals, their number, and the aesthetic composition on the host rock. Specimens with clearly formed, undamaged crystals of intense color, contrasting with the matrix, are most highly valued. The presence of associated minerals is also important. ## Popular Localities The only source of michalskiite specimens is its type locality in Thuringia, Germany. All specimens available on the collector's market originate from this single location.

Care and storage

## Cleaning Michalskiite specimens are extremely small and fragile, therefore mechanical cleaning is not recommended. If absolutely necessary, compressed air can be used from a safe distance to remove loose dust particles. Avoid contact with water and any chemicals. ## What to Avoid Absolutely avoid contact with water, acids, detergents, and other chemical agents. The mineral is soft and brittle, so it should be protected from impacts, scratching, and vibrations. It should not be heated or exposed to prolonged sunlight. ## Storage Michalskiite specimens should be stored exclusively in specialized, sealed "micromount" boxes that protect them from dust, moisture, and mechanical damage. Store in stable conditions, away from heat and moisture sources.

External references

Sources

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