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The complicated solid-state chemistry of this material is relevant to the lore of "freshly prepared" MnO 2 in organic synthesis. [7] The α-polymorph of MnO 2 has a very open structure with "channels", which can accommodate metal ions such as silver or barium. α-MnO 2 is often called hollandite, after a closely related mineral.
Manganese(II) oxide is an inorganic compound with chemical formula MnO. [2] It forms green crystals. The compound is produced on a large scale as a component of fertilizers and food additives .
It may refer more specifically to the following manganese minerals: Birnessite, (Na,Ca) 0.5 (Mn IV,Mn III) 2 O 4 · 1.5 H 2 O; Buserite, MnO 2 ·nH 2 O; Hausmannite, Mn II Mn III 2 O 4; Manganite, Mn III O(OH)
The chemical formula for Ramsdellite is MnO 2. The empirical formula is Mn 4+ O 2. [3] Ramsdellite has the same chemistry as the more common pyrolusite, but is orthorhombic where pyrolusite is tetragonal. [2] Ramsdellite belongs to the Orthorhombic crystal system and Dipyramidal crystal class. [5] Properties: [6]
Pyrolusite is a mineral consisting essentially of manganese dioxide (Mn O 2) and is important as an ore of manganese. [7] It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts.
Birnessite (nominally MnO 2 ·nH 2 O), also known as δ-MnO 2, is a hydrous manganese dioxide mineral with a chemical formula of Na 0.7 Ca 0.3 Mn 7 O 14 ·2.8H 2 O. [5] It is the main manganese mineral species at the Earth's surface, and commonly occurs as fine-grained, poorly crystallized aggregates in soils, sediments, grain and rock coatings (e.g., desert varnish), and marine ferromanganese ...
MnO2. Add languages. Add links. Article; Talk; English. Read; ... This is a redirect from a chemical/molecular formula to its systematic (technical) or trivial name.
Manganese(II,III) oxide is the chemical compound with formula Mn 3 O 4. Manganese is present in two oxidation states +2 and +3 and the formula is sometimes written as MnO·Mn 2 O 3. Mn 3 O 4 is found in nature as the mineral hausmannite.