Aqualite

Chemical formula: (H₃O)₈(Na,K,Sr)₅Ca₆Zr₄+₃Si₂₆O₆₆(OH)₉Cl

Aqualite is a hydrated zirconosilicate of sodium, potassium, strontium, and calcium, forming tiny, colorless crystals in a unique geological environment.

## Characteristics Aqualite is a complex hydrated zirconosilicate from the eudialyte group, occurring as very small, spheroidal aggregates or poorly formed, tabular crystals, rarely exceeding 0.1 mm in size. It is typically colorless and has a white streak. Due to the microscopic size of the crystals, its visual characteristics are difficult to assess without specialized equipment. ## Physical Properties Aqualite crystals exhibit a vitreous luster. Its Mohs hardness is approximately 5. This mineral is brittle and characterized by an uneven fracture. It does not show cleavage. Its density, calculated based on the chemical formula and unit cell parameters, is 2.76 g/cm³. ## History and Name The mineral's name, derived from the Latin words *aqua* (water) and *-lith* (stone), refers to its status as a highly hydrated member of the eudialyte group. It was approved as a new mineral species by the International Mineralogical Association (IMA) in 2003. It was described by Oleg I. Penkovsky and his team based on material collected from the Khibiny Massif on the Kola Peninsula in Russia.

Properties

Mohs hardness: 5
Luster: Vitreous
Streak: White
Density: 2.76
Cleavage: None
Fracture: Uneven
Transparency: Transparent
Crystal system: Trigonal

Diagnostic features

## Identification Identification of aqualite is impossible without advanced analytical techniques. It requires the use of an electron microscope with chemical composition analysis (EDS/WDS) and X-ray diffraction (XRD) to confirm the crystal structure. Visually, in the host rock, it may appear as tiny, colorless grains. ## Distinguishing from Similar Minerals It can be confused with many other colorless minerals from the eudialyte group (e.g., eudialyte, kentbrooksite) or other silicates occurring in the same environment (e.g., quartz, nepheline). Definitive differentiation is only possible based on chemical and structural analysis. ## Crystal Forms It forms spherulitic aggregates or very small, poorly formed tabular crystals, reaching sizes up to 0.1 mm.

Geological environment

## Genesis Aqualite forms in the late stages of hydrothermal processes in highly differentiated, alkaline nepheline syenite intrusions. It crystallizes in voids and fractures in pegmatites, in the presence of solutions rich in zirconium, sodium, and rare earth elements. ## Mineral Associations It co-occurs with other minerals typical of agpaitic pegmatites, such as microcline, nepheline, aegirine, eudialyte, lorenzenite, lamprophyllite, as well as other minerals from the eudialyte group. ## Localities The only confirmed occurrence (type locality) of aqualite in the world is Mount Rasvumchorr in the Khibiny Massif on the Kola Peninsula in Russia.

Rarity

Extremely rare

For collectors

## Quality Criteria Aqualite is a mineral of purely scientific and systematic significance, not a collector's item in the traditional sense. The value of a specimen lies in the confirmed presence of the mineral, documented by analyses. The most valuable samples are those with the largest amount of material for research, originating from the type locality. ## Popular Localities The only source of aqualite is its type locality – Mount Rasvumchorr in the Khibiny Massif, Russia. Specimens from this locality, especially those used for the original description, are extremely scientifically valuable.

Care and storage

## Cleaning Due to its extreme rarity and microscopic size, aqualite specimens are not subject to standard cleaning. Any operations should be performed exclusively under laboratory conditions by specialists. ## What to Avoid Avoid any factors that could damage the host rock containing the aqualite microcrystals. This includes chemicals, ultrasonics, sudden temperature changes, and mechanical stress. ## Storage Specimens containing aqualite should be stored under stable conditions, in specialized micromineral boxes, protected from dust, moisture, and vibrations. It is best to keep them in their original packaging with a label confirming identification.

External references

https://en.wikipedia.org/wiki/https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FAqualite