In its form, low hardness and (0001) very complete cleavage characteristics for identification. Trigonal system, a0 = 0.313 nm, c0 = 0.474 nm; Z = 1. Brucite structure is one of important layered structure. Structure (OH) - approximate hexagonal close packing, separated by a layer of magnesium 2 filling in accumulation into octahedral gap, each surrounded by six OH, Mg each have 3 Mg OH side. [Mg (OH) 6] octahedron ∥ {0001} in total edge way link into a layer, layer to weak hydrogen bond between phase, cambium. Mg - OH not is octahedron, have obvious squashed along the c axis, slice thickness from normal 0.247 nm to 0.211 nm. The structure characteristics of brucite has the tabular crystal shape, low hardness and ∥ {0001} very complete cleavage.

After three partial triangle surface crystal class, d - 3 m (L33L33PC). Crystal show tabular or leaf shape. Common simplex: parallel double c {0001}, {1120}, hexagonal prism m rhombohedron r {1011} {0113} and {2021}, q. Fine crystal plate, usually scaly, round shape and irregular granular aggregate; Parallel fibrous, sometimes referred to as fiber brucite. Fiber brucite is internal structure distortion. White, gray, when with Fe, Mn in a green, yellow or maroon; Fresh surface and fracture vitreous luster, cleavage plane pearly luster, fiber brucite is silk luster; Transparent. Cleavage {0001} very completely. Hardness is 2.5. Fritter flexible and flexible. Relative density 2.3 ~ 2.6. Pyroelectricity. The massive water magnesium stone white degree can reach 95%.

Under polarizer: abnormal interference color red brown instead of the normal level of yellow or orange. Affected by the stress, the ductility can be positive or negative. A crystal axis (), but can show the biaxial crystal, 2 v? 25? . = 1.5705 ~ 1.5861, the refractive index can be No = 1.5612 ~ 1.570, Ne after heating and No difference.

Mechanical properties: the tensile strength of fiber brucite is 902 mpa, belong to moderate intensity fiber materials. The elastic modulus of 13800 mpa, have certain brittleness. Vickers hardness is 50.4 ~ 260.5, and has obvious anisotropy. Easy to ground into a fine powder. The theory of relative density 2.39.

Electromagnetism performance: the quality of the fiber brucite resistivity is 8.82? 106 Ω? G/cm2, volume resistivity is 5.9? 106 Ω? Cm, surface resistivity is 3.6 ~ 4.5? 106 Ω, resistivity anisotropy; When the heating resistance rate to rise. Dielectric constant of 4.7 ~ 5.4 (1 MHZ); Under the condition of low frequency (50 hz) and medium frequency, the dielectric constant increases, and with obvious directivity; Dielectric loss Angle tangent value of 0.105. Heating makes the dielectric constant and dielectric loss tangent value rose 54% and 2.7 times respectively. Fiber brucite than magnetization coefficient is 9.815 ~ 15.779? 10-6 cm3 / g, non-magnetic minerals; Heating makes higher than susceptibility, but around 300 ℃, 500 ℃ and 600 ℃. Temperature higher than 700 ℃, - strong magnetic.

Thermal performance: the brucite reliable using temperature is 400 ℃. The coefficient of thermal conductivity of fiber brucite is 0.46 W/m K, loose fibers is 0.131 ~ 0.213 W/m K (volume density of 0.47 g/cm3). Fiber brucite thermal expansion longitudinal 16.7 * 10-7 / ℃, the transverse 8.8 * 10-7 / ℃, and basically a linear thermal expansion behavior. Fiber brucite also has the properties of flame retardant, resistance to flame and high temperature flame. Fiber brucite decomposition temperature is 450 ℃.

Chemical properties: inorganic fiber brucite is a natural fibre alkali resistance best performers. But can dissolve in acid, oxalic acid, citric acid, acetic acid, mixed acid and Al (OH) 3, in the solution can be dissolved at different speeds. In damp or wet climate, fiber brucite is susceptible to atmospheric CO2, H2O, erosion, so water magnesium stoneware surface waterproof coating.

Surface properties: transmission electron microscopy (sem) determination of single brucite fibre diameter from 0.54 to 0.86 mu m, most XiZhe 0.086 microns. Fiber brucite electric potential can be up to 36.3 mV. Zero potential point of pH value of 12.5. Brucite fiber split, dispersivity is good, the fiber length. Beating by mechanical or chemical dispersion, can obviously increase the beating degree, can be wet spinning and paper. For soluble magnesium compound in strong alkaline solution, hydrolysis of alkaline solution used in the secondary change of magnesia silicate products. Deposit is mainly related to serpentinite; Also in contact metamorphic magnesite limestone, and calcite, tremolite, serpentine, phlogopite symbiosis. Sometimes from dolomitization in the limestone, and calcite, magnesite and periclase associated water. Brucite ore type can be divided into the ball, block type and fiber type three main types:

Ball type: composed of periclase hydration, nodular output, by a few millimeters to more than 20 cm diameter. TB by implicit crystalline brucite and very small amounts of calcite, serpentine cementation. Minerals are of good quality.

Block type: as products rich magnesium hydrothermal alteration rock. Ore block aggregation of crystalline granular, and serpentine, calcite, magnesite, such as symbiosis, brucite content about 30-40%.

Fiber type: a vein from serpentine, content of fiber brucite generally 1 ~ 9%. Stone mineral of serpentine and magnetite. Fiber brucite high purity. Brucite is mainly used in the following industries:

Extraction of Mg and the raw material of MgO style: Mg and MgO style is extracted by brucite, ore of high content of MgO style, less impurity; Decomposition temperature is low; Which is caused by heating of volatile non-toxic harmless, and thus can be extracted from water magnesium stone Mg and MgO style, etc.

Dead-burned magnesite: mainly for the production of magnesia refractories. Modern large iron and steel industry need magnesia carbon brick, magnesite chrome brick, etc. This type of dosage of MgO style has been more than half of its output. By water magnesium stone dead burned magnesite with high density (> 3.55 g/cm3), high (> 2800 ℃), refractoriness Gao Huaxue inertia and the advantages of high heat stability.

Light magnesium oxide, the United States, Russia, Canada, Britain and other countries by chemical method extracted from low grade of water magnesium rock light MgO style.

Fused periclase: for the refinement of high-tech electronic product requirements. With water magnesium writing periclase aggregation of fused method of refining, has high heat conductivity and good electrical insulation, improve product life 2 ~ 3 times.

Pure magnesium chemical reagents: electric heating methods, can extract metal magnesium, producing MgCl2, MgSO4, Mg (NO3) 2, such as chemical reagent.

Reinforcing material: fiber brucite can be used as a substitute of chrysotile in some areas. Used for microporous calcium silicate, calcium silicon plate such as intermediate heat preservation material. The basic formula is: diatomite lime silicate fiber brucite. The fiber content of 8-10%. Products with high whiteness and beautiful appearance, low bulk density.

Flame retardant: polypropylene as matrix production of flame retardant test showed that fiber brucite has good flame retardant effect, is the ideal nonpoisonous, smoke-free, no pollution, high temperature type flame retardant. At the same time can have the enhancement effect of packing.

Paper packing: water magnesium stone white degree is high, splittings sex good, strong adhesion, poor water absorption. Used in combination with the calcite papermaking filler, can make the paper making process by the method of acid instead of soda, and reduce the pollution of water.

Craft: the density of the brucite block color variety, uniform texture, good transparency, fine and smooth; Often associated with other minerals or variant form natural stripe, natural design modelling, ornamental value. Thus can be carved into arts and crafts.