Lianbinite
Chemical formula: (N<sup>3-</sup>H<sub>4</sub>)(C<sub>2</sub>H<sub>3</sub>O<sub>3</sub>)<sup>1-</sup>(C<sub>2</sub>H<sub>4</sub>O<sub>3</sub>)
Lianbinite is an extremely rare organic mineral, a naturally occurring ammonium acetate, discovered in bat guano deposits.
Properties
- Mohs hardness
- 2
- Luster
- Vitreous
- Streak
- White
- Density
- 1.314
- Cleavage
- Perfect on {010}
- Fracture
- Uneven
- Transparency
- Transparent
- Crystal system
- Triclinic
Diagnostic features
## Identification Identification of Lianbinite is impossible without advanced analytical methods, such as X-ray diffraction (XRD) and spectroscopy. In field conditions or in a collection, it is visually unrecognizable. Its occurrence is limited to the specific environment of bat guano. ## Distinguishing from similar minerals It can be confused with other organic minerals found in caves and guano deposits, such as urea or weddellite. Differentiation requires specialized research equipment. ## Crystal forms The mineral forms very small, colorless, tabular crystals, reaching sizes up to 0.1 x 0.05 x 0.01 mm. They occur as single crystals or small clusters on the substrate.
Geological environment
## Genesis Lianbinite forms as a result of the reaction of ammonia, derived from the decomposition of urea in bat guano, with acetic acid, which is a product of organic matter fermentation (e.g., fruits) under specific cave conditions. ## Mineral associations At the type locality, it co-occurs with calcite. ## Localities The only confirmed locality in the world is Shuinan Cave in Fujian Province, China. This is the type locality for this mineral.
Rarity
Extremely rare
For collectors
## Quality criteria Lianbinite is not a mineral available on the collector's market. Its value is purely scientific. The only existing specimens are in research institutions. Should it ever reach the market, any verified specimen, regardless of size, would be extremely valuable due to its rarity.
Care and storage
## Cleaning Due to its extreme rarity and probable water solubility, specimens should not be wet cleaned. Only dust removal with a soft brush or compressed air from a safe distance is recommended. ## What to avoid Contact with water, alcohols, and other solvents must be strictly avoided. The mineral is likely sensitive to changes in humidity and elevated temperatures. It should be protected from direct sunlight. ## Storage Lianbinite specimens must be stored under stable conditions, preferably in a sealed, transparent container (a "perky box") away from sources of moisture and heat. Storage under controlled, low humidity conditions is crucial for preserving the integrity of the sample.