Uralolite

Chemical formula: Ca<sub>2</sub>Be<sub>4</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>3</sub>·5H<sub>2</sub>O

Uralolite is a very rare, hydrated beryllium and calcium phosphate, forming tiny, colorless to white crystals and spherulitic aggregates.

## Characteristics Uralolite is a mineral from the phosphate group, chemically classified as a hydrated beryllium and calcium phosphate. It occurs extremely rarely, forming very small, acicular or bladed crystals, which typically do not exceed 1 mm in length. These crystals often form radial or spherulitic (spherical) aggregates with a silky luster. Due to the small size of the crystals, its macroscopic features are difficult to observe without magnification. ## Physical Properties Uralolite crystals are very brittle. The mineral has a hardness of approximately 5 on the Mohs scale. Its calculated density is 2.35 g/cm³. The luster is described as vitreous on crystal faces and silky in the case of aggregates. ## Colors and Varieties Uralolite is typically colorless to white. No colored or commercial varieties have been distinguished. ## History and Name The mineral was discovered in a granitic pegmatite in the Lipovka area, in the central Urals (Russia). It was described in 1965 by L. N. Ivanov and G. A. Tzvetkov. The name "uralolite" directly refers to its first discovery location – the Ural Mountains.

Properties

Mohs hardness
5
Luster
Vitreous, Silky
Streak
White
Density
2.35
Cleavage
Perfect on {010}
Fracture
Uneven
Transparency
Transparent to translucent
Crystal system
Monoclinic

Diagnostic features

## Identification Identification of uralolite under amateur conditions is practically impossible. It requires specialized analytical methods, such as X-ray diffraction (XRD) or chemical microanalysis (EDS/WDS) to confirm its chemical composition (presence of calcium, beryllium, and phosphorus). Visually, under high magnification, characteristic, tiny, acicular crystals gathered in radial aggregates can be observed. ## Distinguishing from Similar Minerals Uralolite can be confused with other rare beryllium phosphates found in pegmatites, such as moraesite or herderite, which can also form radial aggregates. Final differentiation is possible only with advanced laboratory techniques. ## Crystal Forms Uralolite crystallizes as very small, elongated, acicular or bladed crystals. Most often, it forms radial, stellate, or spherulitic aggregates, as well as fibrous masses.

Geological environment

## Genesis Uralolite is a hydrothermal mineral, crystallizing in the late stage of granitic pegmatite evolution. It forms in rock cavities and fissures as a result of the interaction of phosphorus-rich solutions with beryllium-containing minerals, such as beryl or phenakite. ## Mineral Associations This mineral co-occurs with other minerals typical of the pegmatites in which it was found. In its type locality (Urals), its association with beryl, phenakite, albite, quartz, and muscovite has been noted. ## Localities Uralolite is an extremely rare mineral. Besides its type locality in the Lipovka area in the Urals, Russia, its occurrence has been confirmed in only a few other places worldwide, including pegmatites in North Carolina (USA) and Brazil.

Rarity

Very rare

For collectors

## Quality Criteria As a "micromount" type mineral, the main criterion for evaluating uralolite is the quality and definition of the microcrystals and the richness of aggregates on the rock matrix. The most desirable specimens are those with well-formed, sharp crystals forming aesthetic, radial groups. The size of the aggregate and the contrast with surrounding minerals also increase the specimen's value. ## Popular Localities The most well-known specimens, though still extremely rare, come from the type locality in the Urals, Russia. Specimens from other confirmed localities are equally highly prized by specialized collectors of rare minerals.

Care and storage

## Cleaning Due to its extreme rarity, brittleness, and small crystal size, mechanical cleaning of uralolite is highly inadvisable. If absolutely necessary, compressed air (from a safe distance) can be used to remove loose dust. Avoid contact with water and any chemicals. ## What to Avoid Ultrasonic cleaners, steam cleaners, acids, solvents, and sudden temperature changes should be absolutely avoided. The mineral is very brittle, so it must be protected from any impacts and vibrations. ## Storage Uralolite specimens should only be stored in specialized "micromount" boxes, away from dust, light, and moisture. It is best to keep them in a stable environment to prevent physical damage to the delicate crystals.

Sources

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