todorokite
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Todorokite — is a rare complex hydrous manganese oxide mineral with formula: (Mn,Mg,Ca,Ba,K,Na)2Mn3O12 middot;3H2O. It is a brown to black monoclinic mineral which occurs in massive or tuberose forms. It is quite soft with a Mohs hardness of 1.5 and a… … Wikipedia
todorokite — … Useful english dictionary
List of minerals S-T (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… … Wikipedia
NODULES POLYMÉTALLIQUES — Parmi les différentes formes de dépôts polymétalliques présents sur le fond de l’océan (encroûtements, microconcrétions, sédiments métallifères, saumures, dépôts hydrothermaux), les nodules se distinguent par leur forme définie autour d’un objet… … Encyclopédie Universelle
List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… … Wikipedia
Axinite — – Deposit Topotype, France General Category Borosilicates Chemical formula … Wikipedia
Manganese nodule — Polymetallic nodules, also called manganese nodules, are rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. The core may be microscopically small and is sometimes completely transformed… … Wikipedia
Rhodochrosite — from Sweet Home Mine, Alma, Colorado, USA General Category Mineral species … Wikipedia
Manganite — This article is about the mineral of formula MnO(OH), for other uses of the term manganite see Manganite (disambiguation) Manganite Manganite, Ilfeld, Thuringia, Germany (size: 5.2×4.1×2.7 cm) Gener … Wikipedia
Tantalite — Tantalite, Pilbara district, Australia General Category Oxide minerals Chemical formula … Wikipedia
