![Redox and nonredox reactions of magnetite and hematite in rocks [An article from: Chemie der Erde - Geochemistry - Interdisciplinary Journal for Chemical]](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vKpNOg8NS3wr2Es5yzcbbjgwX8QMJTlMQJvsw1JJRoCnkkVoDgxpBgRHKKYf0Q6qZoF3ZFtxZAtKoyCrV5c27L05S2yPZmfJ_6LZLhvgKjDAspJlwYCHVrL_jKpTYXbacMBFs1zS2c_y2XuQCqo17oBo2s7oP2lGpi6C_QRViipc20QKJopb2xXkTjiIsAKxInfz_xj8jj8OpgKxZ2jin-ML8ohFF2p1jhOecS9plr=s0-d)
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Redox and nonredox reactions causing pseudomorphic replacement of hematite by magnetite and magnetite by hematite are compared. Pseudomorphic replacements resulting from redox reactions are known as martitization [replacement of magnetite by hematite due to oxidation; reaction (1)] and mushketovitization [replacement of hematite by magnetite due to reduction; reaction (2)]. These two replacements cause characteristic ore textures and volume changes (reaction (1): increase of 1.66%; reaction (2): decrease of 1.64%). These small volume changes are the reason that martitization and mushketovitization are widespread in many rocks under condition, however, that oxidizing or reducing fluids (solutions) are present. The same initial and end products may also be involved in
The typical Iron ores are rocks and minerals from which metallic iron can be feasibly extracted. These ores are usually rich in iron oxides or iron sulphides and vary in color from dark grey, bright yellow, deep purple, to rusty red depending on the compound. The iron itself is usually found in the form of magnetite (Fe3O4), hematite (Fe2O3),
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by Leonard F. Heising. This book was made from the digital images scanned during the University of Michigan University Library's enormous digitization efforts. The makers strifes to preserve the intellectual content of items in a manner that allows for a variety of uses. The digital