Hardness = 7–7.5 D(meas.) = 2.91–3.10 D(calc.) = 2.97 Very slowly soluble in H2O; strongly piezoelectric and pyroelectric. Optical Properties: Transparent to translucent. …

Boracite is a borate mineral beloved in blue to green shades. A rare gemstone, it's mostly known among collectors. Learn all about boracite's traits, history, …

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Everything you ever wanted to know about boracite. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.

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These materials become ferroelectric at an elevated temperature (T FE = 466 K for the Co–Br boracite), while at a temperature T c = 10–40 K some of them …

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boracite, colourless, glassy borate mineral, magnesium chloroborate (Mg 3 B 7 O 13 Cl). It has been found as crystals embedded in sedimentary deposits of anhydrite, gypsum, …

The Boracite group is a solid solution series of chloro- borates, with Boracite, Chambersite, and Ericaite, as the main members. Boracite is the magnesium-rich end member, and the most prevalent mineral of this group. Boracite is known for its …

A boracita é um mineral que pertence ao grupo dos boratos e é conhecido por sua estrutura cristalina única e uma variedade de propriedades interessantes. É um mineral natural composto de boro, magnésio e outros elementos.

200 years of research on boracites. The boracite family has attracted the attention of researchers for more than 200 years not only due to its peculiar physical …

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Boracite describes both a mineral group as well as an individual mineral within that group. The Boracite group is a solid solution series of chloro- borates, with Boracite, Chambersite, and Ericaite, as the main members. Boracite is the magnesium-rich end member, and the most prevalent mineral of this group.

Boracite is an uncommon mineral that is named for the boron in the composition. It can be found in bedded sedimentary salt and potash deposits that are of marine origin, where the boron is likely derived from nearby volcanic activity. Localities for Boracite include in Germany, France, England, Kazakhstan, Bolivia, the United States, and Canada, among …

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14.8: Borate Minerals. Mineralogists have identified many borate minerals. Most, especially the anhydrous borates, are very rare. Borate minerals have complex …

Boracite is a mineral that belongs to the borate group and is known for its unique crystal structure and a variety of interesting properties. It is a naturally occurring …

The boracite yields, which under optimum conditions are close to , represent the highest yield of boracite ever reported. Table II gives the calculated …

boracite, colourless, glassy borate mineral, magnesium chloroborate (Mg 3 B 7 O 13 Cl). It has been found as crystals embedded in sedimentary deposits of anhydrite, gypsum, and halite. A massive variety occurs as nodules in the salt-dome deposits at Stassfurt, Ger., where it has been mined as a source of boron. For detailed physical properties, see …

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Boracite. Boulby Mine, Loftus, North Yorkshire, England. Reference: 2112. Two sided boracite specimen with transparent blue-green crystals of good lustre. Unusually, the colour of boracite deepens when viewed in incandescent lighting compared to daylight. Formula: Mg 3 B 7 O 13 Cl. Status: Sold. Dimensions: 32x23x24mm.

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