Hornblende Thin Section
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In ppl a thin section of hornblende ranges from yellow green to dark brown.
Hornblende thin section. The general formula can be given as ca na 2 3 mg fe al 5 al si 8 o 22 oh f 2. To link to this object paste this link in email im or document to embed this object paste this html in website. Hornblende thin section view description.
It is not a recognized mineral in its own right but the name is used as a general or field term to refer to a dark amphibole. Home rocks and minerals hornblende thin section reference url share. Has moderate to high positive relief in thin section.
Hornblende thin section photomicrographs are taken in plane polarized light and cross polarized light and can easily be recognized under the microscope. Green varieties usually have x light yellow green y green or grey green and z dark green. On both photos hornblende pleichroism is evident as well as its cleavage with distinctive angles at 120 degrees.
Brownish varieties have x greenish yelow brown y yellowish to reddish brown and z grey to dark brown. Brownish varieties have x greenish yelow brown y yellowish to reddish brown and z grey to dark brown. Green varieties usually have x light yellow green y green or grey green and z dark green.
Hornblende is a complex inosilicate series of minerals ferrohornblende magnesiohornblende. Thin section of hornblende. Two large hornblende crystals in the same hornblende andesite in california.
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