Brucite


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Related to Brucite: gibbsite

brucite

[′brü‚sīt]
(mineralogy)
Mg(OH)2 A hexagonal mineral; native magnesium hydroxide that appears gray and occurs in serpentines and impure limestones; hardness is 2.5 on Mohs scale, and specific gravity is 2.38-2.40.

Brucite

 

(named after the American mineralogist A. Bruce, died 1818), a mineral of the hydroxide group; chemical composition, Mg(OH)2. The magnesium may be partially replaced by Fe2+ or Mn2+ (ferroand manganobrucites). Brucite crystallizes in a trigonous system and consists of colorless or white (rarely bluish) mica-like crystals, or masses of them, with a layered structure, or sometimes fine-fibered (so-called nemalite) or dense, sinter-like aggregates. Its hardness on the mineralogical scale is 2.5; its density, 2,370-2,400 kg/m3. Formed during hydrothermal changes in ultrabasic magnesial rocks and metamorphosis of dolomites, brucite is found with asbestos in veins of serpentine dunites or peridotites. It may be used as a magnesium ore. In the USSR deposits of brucite have been discovered in massifs of serpentinites and metamorphosed dolomites in the Urals, the Caucasus, and Siberia. Abroad the best known deposits are in the USA, Canada, Italy, and Yugoslavia.

G. P. BARSANOV

References in periodicals archive ?
During this same period the brucite and the titanite specimens were found in the T-area.
The electrokinetic behaviour of magnesium silicates in comparison with silica and brucite is shown in Figure 8.
The present brucite market for flame-retardants is less than 50 000 tonnes annually, but it is increasing exponentially.
The corrosion of metallic ILW such as aluminium and magnesium-aluminium alloy, termed Magnox, encapsulated in composite cements is a well-known process that can cause damage of the wasteforms due to hydrogen gas generation and deposition of an expansive layer of corrosion products such as aluminium hydroxide and stratlingite or brucite (Setiadi, 2006; Setiadi et al.
Here he foregrounds it, beginning with the geological occurrences of magnesite and brucite, then looking at the processing of magnesite to the end product magnesium oxide.
Weathering proceeds as hydration of the brucite sheets of chlorite alters them to vermiculite, forming randomly mixed layers of chlorite-vermiculite.
Brucite is used for magnesium instead a soluble form, as far as at pH > 12, the solutions did not contained detectable amounts for this cation.
Previous research results show that the red mud (Bauxsol[TM]) consisted of a mixture of minerals dominated by hematite, with abundant quartz, boehmite, gibbsite, brucite, calcite, sodalite, para-aluminohydrocalcite, hydrotalcite, and whewellite (McConchie and Clark 2000).
Brucite is a well-known mineral occurring in sediments.
Brucite is inexpensive and has a high magnesium yield.
Other minor constituents of marbles can include fluorite, apatite, brucite, laumontite, olivine, scheelite, spinel, zoisite, and magnetite.