Chanabayaite

Chemical formula: Cu²⁺₂Cl(N₃C₂H₂)¹⁻₂(N³⁻H₃,Cl,H₂O,&#₉₇₂₃;)₄

Chanabayite is a very rare, organic copper mineral of intense blue color, discovered in Chile.

## Characteristics Chanabayite is a hydrated copper chloride with triazolate, making it one of the few organic minerals. It occurs as very small, bladed or tabular crystals, rarely exceeding 1 mm in length. It forms aggregates and coatings. Its most characteristic feature is its intense, azure-blue color. ## Physical Properties This mineral is very soft, with a Mohs hardness of 2, meaning it can be scratched with a fingernail. It is also very light, with a density of only 1.48 g/cm³. The crystals are translucent and exhibit perfect cleavage in one direction. ## Colors and Varieties Chanabayite occurs exclusively in shades of blue, from azure to sky blue. No varieties have been distinguished. ## History and Name It was first described in 2014 by a team of mineralogists (Boess, et al.). Its name comes from its type locality – Chanabaya in the Iquique Province, Chile, where it was found. ## Uses Due to its extreme rarity, small crystal size, and delicacy, chanabayite is exclusively a mineral of scientific and collector's interest. It has no industrial applications.

Properties

Mohs hardness: 2
Density: 1.48
Cleavage: Perfect cleavage on (001) and imperfect cleavage on (100) and (010).
Transparency: Translucent
Crystal system: Orthorhombic

Diagnostic features

## Identification Chanabayite is identified by its intensely blue color, very low hardness (2 on the Mohs scale), and characteristic form of small, bladed crystals. Its occurrence is limited to specific geological conditions. ## Distinguishing from Similar Minerals It can be confused with other blue secondary copper minerals, such as chalcanthite or linarite. However, it is distinguished by its significantly lower hardness and density. Chalcanthite is water-soluble and has a different chemical composition. Final confirmation requires advanced analytical methods, such as X-ray diffraction (XRD). ## Crystal Forms It forms very small, thin, tabular or bladed crystals, elongated in one direction. They usually occur as radial aggregates, rosettes, or thin coatings on the host rock.

Geological environment

## Genesis Chanabayite is a secondary mineral, formed in extremely arid (desert) climatic conditions. Its formation is associated with the interaction of copper- and chlorine-rich solutions with guano deposits (seabird droppings), which are a source of nitrogen and organic compounds. ## Mineral Associations It co-occurs with other rare secondary minerals formed under similar conditions, such as salammoniac, halite, joanneumite, and atacamite. ## Localities The only confirmed locality for chanabayite in the world is its type locality: Pabellón de Pica, near Chanabaya, Iquique Province, Tarapacá Region in northern Chile.

Rarity

Extremely rare

For collectors

## Quality Criteria The most prized specimens are those with well-formed, though still microscopic, crystals forming aesthetic, radial aggregates. The intensity and purity of the blue color and good contrast with the lighter host rock are key. Due to their size, specimens are primarily evaluated under a microscope. ## Popular Localities The only source of specimens is the historic guano mine Pabellón de Pica in Chile. Material from this locality is extremely difficult to acquire.

Care and storage

## Cleaning Chanabayite specimens are extremely delicate and sensitive. Any mechanical cleaning and contact with water, which can damage or dissolve it, should be avoided. The safest way to remove dust is with a soft brush or a photographic blower. ## What to Avoid Contact with water, chemicals, acids, and detergents must be absolutely avoided. The mineral is very soft, susceptible to scratches, and sensitive to changes in temperature and humidity. It should not be exposed to direct sunlight. ## Storage Specimens should be stored in stable conditions, in a closed, dry container (e.g., a "micromount" box), away from sources of light, heat, and moisture. Due to its fragility, it should be protected from shocks and vibrations.