Erythrinum (from ancient Greek ἐρυθρός - red), cobalt flowers are a mineral of the class of arsenates .
| Erythrin | |
|---|---|
 Erythrin from Morocco | |
| Formula | Co 3 (AsO 4 ) 2 · 8 (H 2 O) |
| Physical properties | |
| Colour | Colorless, pink, dark red |
| Color features | pink red |
| Shine | Pearl |
| Transparency | Transparent, translucent |
| Hardness | 1.5 - 2.5 |
| Cleavage | Completed by {010} |
| Density | 3.06 - 3.18 g / cm³ |
| Syngony | Monoclinic (planal) |
Application, Field
Erythrin has almost no practical value, but is an indicator of cobalt ores that are nearby, and sometimes of native silver . Sometimes used for painting glass. Erythrin appears from oxides of cobalt
The most famous deposits are located in Cobalt ( Ontario , Canada ), Schneeberg ( Saxony , Germany ), Bu Azzer ( Morocco ).
Literature
- Eritrin // Elokventia - Yaya. - M .: Soviet Encyclopedia, 1957. - P. 158-159. - (The Great Soviet Encyclopedia : [in 51 t.] / Ch. Ed. B. A. Vvedensky ; 1949-1958, T. 49).
Links
- Erythrin in the webmineral.com database (English)