Baryte

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Baryte (barite)
6158M-barite2.jpg
Baryte crystals from Cerro Huarihuyn, Mirafneelores, Huamalíes, Huánuco, Peru
(size 56 x 53 mm, 74 g)
General
Category Sulfate mineral, barite group
Formula
(repeating unit)
BaSO4
Strunz classification 07.AD.35
Dana classification 28.03.01.01
Crystal symmetry Orthorhombic (2/m 2/m 2/m) dipyramidal
Unit cell a = 8.884(2) Å, b = 5.457(3) Å, c = 7.157(2) Å; A = 4
Identification
Color Colourless, white, licht shades o blue, yellae, grey, broun
Crystal habit Tabular parallel tae base, fibrous, nodular tae massive
Crystal seestem Orthorhombic
Cleavage Perfect cleavage parallel tae base an prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
Fractur Irregular/uneven
Tenacity Brittle
Mohs scale hairdness 3-3.5
Luster Vitreous, pearly
Streak White
Diaphaneity transparent tae opaque
Specific gravity 4.3–5
Density 4.48 g/cm3[1]
Optical properties biaxial positive
Refractive index nα = 1.634–1.637
nβ = 1.636–1.638
nγ = 1.646–1.648
Birefringence 0.012
Fusibility 4, yellaeish green barium flame
Diagnostic features white colour, heich specific gravity, characteristic cleavage an crystals
Solubility low
References [2][3][4][5]

Baryte, or barite, (BaSO4) is a mineral consistin o barium sulfate.[2] The baryte group consists o baryte, celestine, anglesite an anhydrite. Baryte itself is generally white or colourless, an is the main soorce o barium. Baryte an celestine furm a solid solution (Ba,Sr)SO4.[1]

References[eedit | eedit soorce]

  1. 1.0 1.1 Hanor, J. (2000). "Barite-celestine geochemistry and environments of formation". Reviews in Mineralogy (Washington, DC: Mineralogical Society of America) 40: 193–275. ISBN 0-939950-52-9. 
  2. 2.0 2.1 Dana, James Dwight; Ford, William Ebenezer (1915). Dana's Manual of Mineralogy for the Student of Elementary Mineralogy, the Mining Engineer, the Geologist, the Prospector, the Collector, Etc. (13 ed.). John Wiley & Sons, Inc. pp. 299–300. 
  3. Barite at Mindat
  4. Webmineral data for barite
  5. Baryte, Handbook of Mineralogy