Wad (Vadit) is the common name for minerals - earthy mixtures of manganese hydroxides . It mainly consists of pyrolyusitis and psilomelan . The chemical composition is variable. The content of MnO + MnO 2 32–75%, H 2 O 10-21%. Color from dark brown to black. Hardness low, max. - up to 4. Density 2,8-4,4. Highly porous. Wad refers to the hypergene formations typical of weathering crusts and oxidation zones of oxides, carbonate and silicate ores of Mn . There are aluminum alloys, tungsten, ferruginous, cobalt, lithium, copper (copper) and others.
| In hell | |
|---|---|
 Pyrolusite and Wad ( Tennessee , USA ) | |
| Formula | MnO 2 X nH 2 O |
| Impurity | Ca, Cu, Li |
| Physical properties | |
| Colour | Dark brown to black |
| Shine | Glass |
| Transparency | Opaque |
| Hardness | up to 4 |
| Cleavage | Imperfect by {101} |
| Density | 2.8-4.4 g / cm³ |
Wad is manganese ore . In Ukraine, in the Nikopol manganese deposit. It is enriched with combined gravity-flotation schemes ( flushing , depositing , magnetic separation and flotation ) [1] .
Notes
- ↑ Small Mountain Encyclopedia . In 3 t. = Mala gіrnicha encyclopedia / (In Ukrainian). Ed. V.S. Beletsky . - Donetsk: Donbass, 2004. - ISBN 966-7804-14-3 .