Batiferrite

Chemical formula: BaTi₄+₂Fe₃+₈Fe₂+₂O₁₉

Barytiferite is a rare, black, metallic oxide mineral from the magnetoplumbite group, found in metamorphic rocks.

## Characteristics Barytiferite is a rare mineral from the magnetoplumbite group, belonging to the oxide class. It occurs as hexagonal, tabular crystals up to 1 mm in size, forming aggregates within the host rock. It is opaque and has a black color and metallic luster, giving it an appearance similar to hematite or magnetite. ## Physical properties This mineral is characterized by a Mohs hardness of approximately 6. Its density is significant, around 5.28 g/cm³. It possesses a metallic luster and a black streak. ## Colors and varieties Barytiferite occurs exclusively in black. No colored or commercial varieties are known. ## History and name The name "barytiferite" alludes to its chemical composition, indicating the presence of barium (Ba), titanium (Ti), and iron (ferrum). The mineral was first described in 1979 by S.E. Kudesheva and collaborators based on material found in the Korshunovskoye iron deposit in Siberia, Russia, which is its type locality. ## Applications Due to its extreme rarity, barytiferite has no industrial applications. It is solely an object of scientific and collecting interest for specialized collectors of rare minerals.

Properties

Mohs hardness: 6
Luster: Metallic
Streak: Black
Density: 5.28
Cleavage: None
Fracture: Uneven
Transparency: Opaque
Crystal system: Hexagonal

Diagnostic features

## Identification Field identification of barytiferite is practically impossible due to its microscopic size and resemblance to other black metallic minerals. Recognition requires advanced laboratory methods, such as chemical analysis (EDS) and X-ray diffraction (XRD). ## Distinguishing from similar minerals Barytiferite can be confused with magnetite, hematite, ilmenite, or other minerals from the magnetoplumbite group. It is distinguished from magnetite by the lack of strong magnetism. Definitive differentiation from others requires specialized analytical studies. ## Crystal forms It forms very small, hexagonal, tabular crystals, usually not exceeding 1 mm. They occur as inclusions in other minerals or form small aggregates.

Geological environment

## Genesis Barytiferite forms under conditions of contact metamorphism. In its type locality (Korshunovskoye deposit), it was found in pyroxene-magnetite rocks, which formed as a result of magma interaction with iron-rich sedimentary rocks and evaporites. ## Mineral associations This mineral coexists with magnetite, hematite, diopside, phlogopite, anhydrite, calcite, and apatite. ## Localities The only confirmed and well-documented occurrence of barytiferite in the world is the Korshunovskoye iron deposit, located in the Irkutsk Oblast in Siberia, Russia.

Rarity

Extremely rare

For collectors

## Quality criteria The quality of a barytiferite specimen is assessed primarily based on the presence of well-visible (though still microscopic) and well-formed crystals, as well as the richness of their aggregates on the host rock. Contrast with surrounding minerals also enhances visual appeal. ## Popular localities The only source of collector specimens is the type locality - the Korshunovskoye deposit in Russia. Material from this location is extremely difficult to acquire on the market.

Care and storage

## Cleaning Due to the rarity and potential fragility of microscopic crystals, mechanical or chemical cleaning is not recommended. If necessary, compressed air can be used to remove dust. ## What to avoid Avoid contact with acids and other aggressive chemicals. Do not subject the specimen to ultrasound or sudden temperature changes. Store away from moisture. ## Storage Barytiferite specimens, typically in the form of microcrystals within the host rock, should be stored in stable conditions, in a closed display box, to protect them from mechanical damage and dust.

Sources

IMA Mineral List (CNMNC)