Majzlanite
Chemical formula: K₂Na(Zn²⁺Na)Ca(S⁶⁺O₄)₄
Majzlanite is a rare potassium, sodium, zinc, and calcium sulfate, forming tiny, tabular, grayish-blue crystals, discovered in the fumaroles of Tolbachik volcano.
Properties
- Mohs hardness
- 2-3
- Luster
- Vitreous
- Streak
- White
- Density
- 2.961
- Fracture
- Irregular/Uneven
- Crystal system
- Monoclinic
Diagnostic features
## Identification Amateur identification of majzlanite is practically impossible due to the microscopic size of the crystals and its occurrence in complex parageneses. Recognition requires advanced analytical methods, such as X-ray diffraction (XRD) and chemical spectroscopy (EDS/WDS). The characteristic grayish-blue color and mineral associations can be indicative. ## Differentiation from Similar Minerals It can be confused with other fine-grained sulfates from the alluaudite group occurring in the same environment, such as wulffite or dravertite. Definitive differentiation is only possible based on chemical and crystallographic analysis. ## Crystal Forms Majzlanite forms very small, thin, tabular crystals with a hexagonal outline. These crystals often combine into rosette-like or radial aggregates, and also form thin crusts and coatings on the rock surface.
Geological environment
## Genesis Majzlanite is a fumarolic mineral. It forms by sublimation from hot, sulfur-rich volcanic gases at temperatures above 450°C. It crystallizes directly on the surface of porous basaltic lava (scoria) near volcanic exhalations. ## Mineral Associations This mineral co-occurs with other rare fumarolic sulfates, such as aphthitalite, langbeinite, arcanite, dravertite, wulffite, as well as hematite and tenorite. ## Localities The only confirmed occurrence of majzlanite in the world is its type locality: Yadovitaya fumarole, located in the Tolbachik volcanic field on the Kamchatka Peninsula in Russia.
Rarity
Extremely rare
For collectors
## Quality Criteria As a microscopic mineral, majzlanite is primarily valued by collectors specializing in "micromount" specimens, as well as systematic minerals and those from type localities. Specimens with rich, well-formed crystal aggregates, clearly visible under a microscope, are most highly rated. A contrasting basaltic matrix enhances aesthetic appeal. The purity and size of individual crystals, though still microscopic, are also significant. ## Popular Localities The only source of majzlanite specimens is its type locality – Tolbachik volcano in Kamchatka. Material from this locality is extremely limited and available mainly through specialized dealers and research institutions involved in its discovery.
Care and storage
## Cleaning Majzlanite specimens are extremely delicate and small. Mechanical cleaning should be avoided. If absolutely necessary, compressed air can be used from a safe distance to remove loose particles. Contact with water is not recommended due to potential solubility. ## What to Avoid Contact with water, acids, and other chemicals must be strictly avoided. The mineral is sensitive to changes in temperature and humidity. It should not be heated or exposed to direct sunlight. Due to its low hardness, it is very susceptible to scratches and mechanical damage. ## Storage Specimens should be stored under stable conditions, preferably in closed, padded "micromount" boxes that protect against dust, humidity, and physical damage. Display should be in sealed display cases with controlled humidity.