Ammineite
A variety of Minerals
What is Ammineite?
Ammineite is the first recognized mineral containing ammine groups. Its formula is [CuCl2(NH3)2]. The mineral is chemically pure. It was found in a guano deposit in Chile. At the same site other ammine-containing minerals were later found: Chanabayaite, CuCl(N3C2H2)(NH3)·0.25H2O (an alternative formula), a triazolate mineral Joanneumite, Cu(C3N3O3H2)2(NH3)2, an isocyanurate mineral Shilovite, Cu(NH3)4(NO3)2
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Ammineite Localities Map
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Key Characteristics
Composition of Ammineite
The characteristic features of the structure of ammineite are: layers of trans form of the copper complex, parallel to (001), connected by Cu-Cl bonds presence of CuN2Cl4 distorted octahedron ([4+2] coordination) edge-sharing of the octahedra produce zigzag chains along the [001] direction hydrogen bonds between NH3 and Cl atoms
Quick Facts
Physical Properties
- Color
- Deep blue to sky blue
- Hardness (Mohs)
- 1
- Density
- 2.34 g/cm³
- Streak
- Light blue
Chemical Properties
- Chemical Formula
- [CuCl2(NH3)2]
- Elements
- Cl, Cu, H, N
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