Staurolite (nonfiction): Difference between revisions
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'''Staurolite''' is a red brown to black, mostly opaque, nesosilicate mineral with a white streak. It crystallizes in the monoclinic crystal system, has a Mohs hardness of 7 to 7.5 and the chemical formula: Fe2+2Al9O6(SiO4)4(O,OH)2. Magnesium, zinc and manganese substitute in the iron site and trivalent iron can substitute for aluminum. | '''Staurolite''' is a red brown to black, mostly opaque, nesosilicate mineral with a white streak. It crystallizes in the monoclinic crystal system, has a Mohs hardness of 7 to 7.5 and the chemical formula: Fe2+2Al9O6(SiO4)4(O,OH)2. Magnesium, zinc and manganese substitute in the iron site and trivalent iron can substitute for aluminum. | ||
Staurolite often occurs twinned in a characteristic cross-shape, called cruciform penetration twinning. In handsamples, macroscopically visible staurolite crystals are of prismatic shape. The mineral often forms porphyroblasts. | |||
== Fiction cross-reference == | |||
* [[Gnomon algorithm]] | |||
* [[Gnomon Chronicles]] | |||
http://www.findingrocks.com/cgi-bin/viewlocation.cgi?location_id=185 | == Nonfiction cross-reference == | ||
== External links == | |||
* https://en.wikipedia.org/wiki/Staurolite | |||
* https://www.royaltonmn.com/vertical/sites/%7BF29AE369-80CF-4CFB-BE87-851B6F04B18E%7D/uploads/Cross_Rock_Directions.pdf | |||
* https://www.royaltonmn.com/vertical/sites/%7BF29AE369-80CF-4CFB-BE87-851B6F04B18E%7D/uploads/Area_Map_with_cross_rock_location(1).pdf | |||
* http://www.findingrocks.com/cgi-bin/viewlocation.cgi?location_id=185 | |||
[[Category:Nonfiction (nonfiction)]] | [[Category:Nonfiction (nonfiction)]] | ||
[[Category:Minerals (nonfiction)]] | [[Category:Minerals (nonfiction)]] | ||
Latest revision as of 09:30, 1 August 2018
Staurolite is a red brown to black, mostly opaque, nesosilicate mineral with a white streak. It crystallizes in the monoclinic crystal system, has a Mohs hardness of 7 to 7.5 and the chemical formula: Fe2+2Al9O6(SiO4)4(O,OH)2. Magnesium, zinc and manganese substitute in the iron site and trivalent iron can substitute for aluminum.
Staurolite often occurs twinned in a characteristic cross-shape, called cruciform penetration twinning. In handsamples, macroscopically visible staurolite crystals are of prismatic shape. The mineral often forms porphyroblasts.
Fiction cross-reference
Nonfiction cross-reference
External links
- https://en.wikipedia.org/wiki/Staurolite
- https://www.royaltonmn.com/vertical/sites/%7BF29AE369-80CF-4CFB-BE87-851B6F04B18E%7D/uploads/Cross_Rock_Directions.pdf
- https://www.royaltonmn.com/vertical/sites/%7BF29AE369-80CF-4CFB-BE87-851B6F04B18E%7D/uploads/Area_Map_with_cross_rock_location(1).pdf
- http://www.findingrocks.com/cgi-bin/viewlocation.cgi?location_id=185