Edingtonite

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Edingtonite
Edingtonite-120476.jpg
Edingtonite from Ice River Alkaline Complex, Golden Mining Division, British Columbia, Canada
General
Category Tectosilicate
Formula
(repeating unit)
BaAl2Si3O10·4H2O
Strunz classification 09.GA.15
Identification
Crystal system Orthorhombic, some are tetragonal
Mohs scale hardness 4 - 5
Optical properties Biaxial (-)
Refractive index nα = 1.538 nβ = 1.549 nγ = 1.554
Birefringence δ = 0.016
2V angle Calculated: 66°
References [1][2]

Edingtonite is a white, gray, brown, colorless, pink or yellow zeolite mineral. Its chemical formula is BaAl2Si3O10·4H2O. It has varieties with tetragonal, orthorhombic or triclinic crystals.[3]

It was named for Scottish mineral collector James Edington (1787–1844).[2]

References[edit]

  1. ^ Edingtonite mineral data from Webmineral
  2. ^ a b Edingtonite mineral data from Mindat.org
  3. ^ Richard V. Gaines, H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig: "Dana's new mineralogy", pp. 1683-1684. John Wiley & Sons, 1997

External links[edit]

Media related to Edingtonite at Wikimedia Commons