Asharit (also saibelite or scabelite ) is a mineral of the borate class. Chemical formula: Mg2 (OH) (B2O4 (OH)). Impurities: Fe2 +, Mn.
A common mineral of endogenous deposits of boron ores and saline sedimentary strata. The main mineral of endogenous boron ores is suanite , kotoite , ludwigite and other types.
The color is white, grayish, yellowish. Fragile. The hardness according to the mineralogical scale is 3-3.5. Density 2690 kg / m3 (2.65 g / cm3). In Canada , DPRK and Morocco , its concentrations in serpentinite are significant.
The main mineral of borate ores in the Atyrau region of Kazakhstan.
Title
English Ascharite - from Ascharia , the ancient Roman name of the city of Aschersleben , in Saxony , Germany, where the find is located. A synonym is scribe, from Szaibelyite in honor of the Hungarian mining engineer Stefan Szabeli (Stephen Szaibely or Sjájbely, 1777-1855).
Varieties
Hydrocharite Mg₂ [B₂O₅] · H₂O is a variety with a high content of weakly bound water. Two monoclinic and one rhombic modifications are known. The asharite subchain structure is based on the columns of Mg (O, OH) 6-octahedra connected to each other by island anionic radicals from the double triangles BO3 and BO2OH. Crystals are rare, finely fibrous aggregates or pseudomorphs along early endogenous borates, dense and earthy masses, and nodules are more common. The raids are characteristic of its exogenous differences.
Literature
- Asharit // Kazakhstan. National Encyclopedia . - Almaty: Kazakh encyclopedias , 2004. - T. I. - ISBN 9965-9389-9-7 .
- Alexander CM, Barsukov B. L., Scherbina BB, Geochemistry of endogenous boron, M., 1968.
- Schaller, Waldemar Theodore (1942), The identity of ascharite, camsellite and B-ascharite with szaibelyite; and some relationships of the magnesium borate minerals: Am. Min .: 27: 467–486.
- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 375.
When writing this article, material from the publication Kazakhstan. National Encyclopedia ”(1998-2007), provided by the editors of the“ Kazakh Encyclopedia ”under a Creative Commons BY-SA 3.0 Unported license .