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An uncommon mineral composed of dibasic copper sulfate. Antlerite is an emerald green to blackish-green color and is found in the oxidized zones of copper deposits of Arizona and Chile. It has also been identified as a corrosion product on outdoor bronze and copper sculpture. Though similar in color to malachite and brochantite, antlerite does not effervesce in contact with acid.

Synonyms and Related Terms

antlerita (Esp.); antierite (Port.); Antlerit (Deut.); antleriet (Ned.)




MFA- Antlerite.jpg

Other Properties

Crystal system = orthorhombic bipyramidal Cleavage = unidirectional Fracture = uneven Luster = vitreous Streak=pale green

Composition Cu3(OH)4SO4
Mohs Hardness 3.5-4.0
Density 3.88
Refractive Index 1.72-1.78

Sources Checked for Data in Record

  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996