manganous hydroxide

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• manganous hydroxide — noun : a crystalline amphoteric compound Mn(OH)2 that is found in nature as pyrochroite, that is obtained synthetically as a white precipitate by adding alkali to a solution of a manganous salt, and that rapidly turns brown in air by oxidation …   Useful english dictionary

• manganese processing — Introduction       preparation of the ore for use in various products.       Manganese (Mn) is a hard, silvery white metal with a melting point of 1,244° C (2,271° F). Ordinarily too brittle to be of structural value itself, it is an essential… …   Universalium

• pyrochroite — ˌpīrəˈkrōˌīt, pīˈräkrəˌwīt noun ( s) Etymology: Swedish pyrochroit, from pyr + Greek chrōs color + Swedish it ite; from the fact that it becomes colored when heated more at chromatic …   Useful english dictionary

• manganese — /mang geuh nees , neez /, n. Chem. a hard, brittle, grayish white, metallic element, an oxide of which, MnO2 (manganese dioxide), is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness. Symbol: Mn; at. wt …   Universalium

• Psilomelane — Infobox mineral name = Psilomelane category = boxwidth = boxbgcolor = caption = A native sample of psilomelane formula = The general formula Ba(Mn2+)(Mn4+)8O16(OH)4 or as (Ba,H2O)2Mn5O10 Barium Manganese Oxide Hydroxide molweight = 590.03 gm… …   Wikipedia

• equivalent weight — Chem. the combining power, esp. in grams (gram equivalent), of an element or compound, equivalent to hydrogen as a standard of 1.00797 or oxygen as a standard of 8; the atomic weight divided by the valence. [1925 30] * * * or combining weight… …   Universalium

• Microbial metabolism — is the means by which a microbe obtains the energy and nutrients (e.g. carbon) it needs to live and reproduce. Microbes use many different types of metabolic strategies and species can often be differentiated from each other based on metabolic… …   Wikipedia

• tungsten — tungstenic /tung sten ik/, adj. /tung steuhn/, n. Chem. a rare, metallic element having a bright gray color, a metallic luster, and a high melting point, 3410° C, and found in wolframite, tungstite, and other minerals: used in alloys of high… …   Universalium

• manganite — [maŋ′gənīt΄] n. 1. a dark colored, shiny mineral, MnO(HO), that is an ore of manganese; hydrous manganese oxide 2. any of a series of salts that may be considered as derivatives of manganous acid, the hydroxide of tetravalent manganese …   English World dictionary