Olivine

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Olivine
Peridot2.jpg
General
Category Nesosilicate
Olivine group
Olivine series
Formula
(repeatin unit)
(Mg, Fe)2SiO4
Creestal seestem Orthorhombic
Identification
Colour Yellae tae yellae-green
Creestal habit Massive tae granular
Cleavage Puir
Fractur Conchoidal – brittle
Mohs scale haurdness 6.5–7
Skinkle Vitreous
Streak None
Diaphaneity Transparent tae translucent
Speceefic gravity 3.2–4.5[1][2][3][4]
Optical properties Biaxial (+)
Refractive index nα = 1.630–1.650
nβ = 1.650–1.670
nγ = 1.670–1.690
Birefringence δ = 0.040
References [5][6][7]

The meeneral olivine is a magnesium airn silicate wi the formula (Mg+2, Fe+2)2SiO4.

References[eedit | eedit soorce]

  1. Mick R. Smith (1999). Stone: Building Stone, Rock Fill and Armourstone in Construction. Geological Society of London. pp. 62–. ISBN 978-1-86239-029-4. Specific Gravity 3.5-4.5 
  2. Jessica Elzea Kogel (2006). Industrial Minerals & Rocks: Commodities, Markets, and Uses. SME. pp. 679–. ISBN 978-0-87335-233-8. The specific gravity is approximately 3.2 when pure rises with increasing iron content. 
  3. "Olivine". Science.smith.edu. Retrieved 2013-11-14. G = 3.22 to 4.39. Specific gravity increases and hardness decreases with increasing Fe. 
  4. "University of Minnesota's Mineral Pages: Olivine". Geo.umn.edu. Retrieved 2013-11-14. Specific Gravity: 3.2 (Mg-rich variety) to 4.3 (Iron-rich variety) (average weight) 
  5. Olivine. Webmineral.com Retrieved on 2012-06-16.
  6. Olivine. Mindat.org Retrieved on 2012-06-16.
  7. Klein, Cornelis; C. S. Hurlburt (1985). Manual of Mineralogy (21st ed.). New York: John Wiley & Sons. ISBN 0-471-80580-7.