Calclacite
| Calclacite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | Ca(CH3COO)Cl · 5H2O |
| Crystal system | Monoclinic |
| Identification | |
| Color | White |
| Mohs scale hardness | 1.5 |
| Diaphaneity | Translucent |
| Density | 1.5 g/cm3 (measured); 1.55 g/cm3 (calculated) |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.468 nβ = 1.484 nγ = 1.515 |
| Birefringence | δ = 0.047 |
| 2V angle | Measured: 80°, Calculated: 74° |
| Dispersion | Relatively feeble |
| References | [1] |
Calclacite is a mineral and an organic compound. Its name references the components, which are Calcium ions, Chloride (Cl−) and Acetate (Ethanoate) CH3COO2−.
Characeristics
Calclacite is an organic compound with chemical formula Ca(CH3COO)Cl · 5H2O. It forms crystals in the monoclinic system, with silky hairlike efflorescences up to 4 cm long.
According to the Nickel-Strunz classification, calclacite belongs to "10.AA - Salts of organic acids: formates, acetates, etc" along with the following minerals: formicaite, acetamide, dashkovaite, paecite and hoganite.[2] It is white and its hardness on the Mohs scale is 1.5.
Formation
Calclacite is formed on samples of rocks and fossils, and on fragments of ceramics, by the action of acetic acid on oak.[2]
References
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.