Baryte - BaSO4

Baryte, or barite, (BaSO4) is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte and celestine form a solid solution (Ba,Sr)SO4.

The name baryte is derived from the Greek word "bar˛s" (heavy). Baryte occurs in a large number of depositional environments, and is deposited through a large number of processes including biogenic, hydrothermal, and evaporation, among others.[1] Baryte commonly occurs in lead-zinc veins in limestones, in hot spring deposits, and with hematite ore. It is often associated with the minerals anglesite and celestine.

This is a thin section of radial growths of Barite (or Heavy Spar). Collected from a mineral vein in the Hope Valley, near Castleton, Derbyshire. Shows "Plumose" (literally like feathers) Structure.

Optical characteristics

• Color: Gray or colorless
• Form: Needlelike crystals, massive crystals or Plumose masses
• Birifrangence: interference colour from low to moderate


Bibliography



• Deer, W.A., Howie, R.A., Zussman, J. (1998) Rock-forming Minerals.
• Optical Mineralogy : The Nonopaque Minerals by Phillips / Griffen
• E. WM. Heinrich (1956): Microscopic Petrografy. Mcgraw-hill book company,inc


Photo
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
barite(14).jpg

Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
barite(15).jpg

Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. PPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
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Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
barite(37).jpg

Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)
barite(38).jpg

Plumose masses of Baryte crystals. XPL image, 2x (Field of view = 7mm)