Baryte

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Baryte (barite)
6158M-barite2.jpg
Baryte crystals frae Cerro Huarihuyn, Mirafneelores, Huamalíes, Huánuco, Peru
(size 56 x 53 mm, 74 g)
General
CategorySulfate meeneral, barite group
Formula
(repeatin unit)
BaSO4
Strunz clessification07.AD.35
Dana clessification28.03.01.01
Creestal seestemOrthorhombic
Space groupOrthorhombic (2/m 2/m 2/m) dipyramidal
Unit cella = 8.884(2) Å, b = 5.457(3) Å, c = 7.157(2) Å; A = 4
Identification
ColourColourless, white, licht shades o blae, yellae, grey, broun
Creestal habitTabular parallel tae base, fibrous, nodular tae massive
CleavagePerfect cleavage parallel tae base an prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
FracturIrregular/uneven
TenacityBrickle
Mohs scale haurdness3-3.5
SkinkleVitreous, pearly
StreakWhite
Diaphaneityskyre tae opaque
Speceefic gravity4.3–5
Density4.48 g/cm3[1]
Optical propertiesbiaxial positive
Refractive indexnα = 1.634–1.637
nβ = 1.636–1.638
nγ = 1.646–1.648
Birefringence0.012
Fusibility4, yellaeish green barium flame
Diagnostic featurswhite colour, heich specific gravity, characteristic cleavage an crystals
Solubilitylaw
References[2][3][4][5]

Baryte, or barite, (BaSO4) is a meeneral consistin o barium sulfate.[2] The baryte group consists o baryte, celestine, anglesite an anhydrite. Baryte itsel 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