Search results
Results From The WOW.Com Content Network
Polymetallic nodules, also called manganese nodules, are mineral concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. As nodules can be found in vast quantities, and contain valuable metals, deposits have been identified as a potential economic interest. [ 1 ]
Nodule is also used for widely scattered concretionary lumps of manganese, cobalt, iron, and nickel found on the floors of the world's oceans. This is especially true of manganese nodules. Manganese and phosphorite nodules form on the seafloor and are syndepositional in origin. Thus, technically speaking, they are concretions instead of nodules ...
Polymetallic nodules on the deep seabed in the CCZ Example of manganese nodule that can be found on the sea floor. Polymetallic nodules are found at depths of 4–6 km (2.5–3.7 mi) in all major oceans, but also in shallow waters like the Baltic Sea and in freshwater lakes. [23] [24] They are the most readily minable type of deep sea ore. [25]
This page was last edited on 17 December 2012, at 07:09 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The Expedition 16 crew moved the Pressurized Mating Adapter (PMA-2) on 12 November 2007 from Destiny to the forward berth of Harmony. The combined PMA-2/Harmony unit was subsequently berthed to its final destination at the forward end of Destiny on 14 November 2007. [8] All the following Space Shuttle missions would dock at this location.
Buserite is a hydrated layered manganese-oxide mineral with nominal chemical formula MnO 2 ·nH 2 O. It was named after Swiss chemist professor Wilhelm Buser (1917-1959), who first identified it in 1952 in deep-sea manganese nodules. Buser named it 10 Å manganate because the periodicity in the layer stacking direction was 10 Å.
The unit cell has six manganese Mn 4+ sites and twelve oxygen O 2− sites constituting the octahedral framework. Mg and Al may substitute for Mn, and the tunnels contain large cations and water molecules. There is one formula unit per unit cell (Z = 1). [5] [6] [8] The side lengths are a = 9.8 Å, b = 2.8 Å and c = 9.6 Å, with angle β = 94. ...
Hübnerite or hubnerite is a mineral consisting of manganese tungsten oxide (chemical formula MnWO 4). It is the manganese endmember of the manganese–iron wolframite solid solution series. It forms reddish brown to black monoclinic prismatic submetallic crystals. The crystals are typically flattened and occur with fine striations.