ulexite

[′ü·lek‚sīt]

(mineralogy)

NaCaB₅O₉·8H₂O A white mineral that crystallizes in the triclinic system and forms rounded reniform masses of extremely fine acicular crystals. Also known as cotton ball.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ulexite

(named after the German chemist G. L. Ulex [1811-83]), a mineral of the subclass of hydrous borates, NaCa[B₅0₉]-8H₂0. Ulexite crystallizes in the monoclinic system. It forms white compact masses of fine fibers or radiating aggre gates. It has a hardness of 1 on Mohs’ scale and a density of 1,650 kg/m³. Ulexite occurs as a supergene mineral in lake deposits and is a substitution product in argillaceous gypsum-bearing ores in salt domes. It is an ore of boron. Ulexite deposits are found at Inder (USSR) and in Nevada (USA).

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References in periodicals archive

Sugozu (2009) produced the brake pad specimens using ulexite, colemanite, boric acid and borax pentahydrate which are boron derivatives, and then examined the properties of the produced brake pads including the friction, wear, and resistance.

INVESTIGATION OF ULEXITE USAGE IN AUTOMOTIVE BRAKE FRICTION MATERIALS

Also in a study used Taguchi method [17], the optimization of the dissolution of ulexite in SO2-saturated water has been investigated.

Optimization of Boric Acid Extraction From Colemanite With An Environmentally Friendly Process By Using The Taguchi Method

Kunkul, "Dissolution kinetics of ulexite in perchloric acid solutions," International Journal of Mineral Processing, vol.

Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil

Three other commercially available B sources viz., borax, ulexite and colemanite were also co-granulated with MAP.

Slow-release boron fertilisers: co-granulation of boron sources with mono-ammonium phosphate (MAP)

Colak, Leaching kinetics of ulexite in borax pentahydrate solutions saturated with carbon dioxide, Journal of Industrial and Engineering Chemistry, 16(2010), No.5.

MAGNESITE ORE DISSOLUTION WITH ORGANIC ACID AND PARAMETRIC CUMULATIVE EFFECT OF REACTION PARAMETERS

(2005) como eficaz para diferenciar la masa de ulexite de otros materiales que no lo son.

Analisis multitemporal y multifractal de la desglaciacion de la cordillera paron en los andes de Peru

investigated ulexite in borax pentahydrate solutions.

The use of artificial neural network for prediction of dissolution kinetics

The crushed ores are colemanite (Ca2B6O .5H O), ulexite (Na O.2CaO.5B2O3.16H2O), datolite (2CaO.B2O3.2SiO2.H2O), hydroboracite (CaO.MgO.3B2O3.6H2O) and ascharite (2MgO.B2O3.H2O).

EFFICACY OF CRUSHED ORE COLEMANITE AS BORON FERTILIZER FOR RICE GROWN UNDER CALCAREOUS SOIL CONDITIONS

I once saw a 70-year-old lady encountering a fine acicular ulexite specimen for the first time.

About mineral collecting part 4 of 5: some personal observations, ruminations, reflections, reminiscences, ramblings, digressions, grumblings, approbations, wisdom and advice gleaned from 50 years of collecting and dealing in minerals

Within commercial products and the most important minerals that contain boron are the borax pentahydrate, sodium perborate, boric acid, colemanite and ulexite. Different applications for these compounds exist, between which can be mentioned: fiber glass, enamels, fire delayers, fertilizers and agricultural herbicides (IPCS, 1998).

Histopathological effects of Boron on mouse liver/ Efectos histopatologicos del Boro en higado de raton

More than 230 different types of boron minerals are known in nature, but the number having commercial importance is limited to the following: tincal, colemanite, kernite, ulexite, pandermite, boracite, szaibelyite and hydroboracite.

Boron in Turkey: between myth and reality