Event Title
Epidote
Location
Parker-Reed, SSWAC
Start Date
30-4-2015 2:00 PM
End Date
30-4-2015 3:55 PM
Project Type
Poster
Description
Epidote was initially discovered in the 18th century, but it was not until 1801 in France that Rene Just Hay first classified the species of mineral by giving it the name epidote. Epidote minerals are most likely to occur in the metamorphism of calcium rich sedimentary and igneous rocks, ideally under sheering stress and low temperatures. These minerals are formed during retrograde readjustments linked with the dynamic metamorphism, usually of basic igneous rocks. Epidote has no real use as an industrial mineral and has a very minimal appearance in the jewelry market because of its dark green color. Epidote is monoclinic, meaning that its crystallography is comprised of three different vectors of different lengths.The structure of epidote consists of repeating chains of AlO6 and AlO4(OH)2 octahedra that appear parallel to the y-axis and are connected by SiO4 and double Si2O7 tetrahedral groups. Outside of these chains are atoms of iron and aluminum in octahedral coordination along with calcium ions irregularly surrounded by eight oxygens.
Faculty Sponsor
Herb Wilson
Sponsoring Department
Colby College. Geology Dept.
CLAS Field of Study
Natural Sciences
Event Website
http://www.colby.edu/clas
ID
1435
Epidote
Parker-Reed, SSWAC
Epidote was initially discovered in the 18th century, but it was not until 1801 in France that Rene Just Hay first classified the species of mineral by giving it the name epidote. Epidote minerals are most likely to occur in the metamorphism of calcium rich sedimentary and igneous rocks, ideally under sheering stress and low temperatures. These minerals are formed during retrograde readjustments linked with the dynamic metamorphism, usually of basic igneous rocks. Epidote has no real use as an industrial mineral and has a very minimal appearance in the jewelry market because of its dark green color. Epidote is monoclinic, meaning that its crystallography is comprised of three different vectors of different lengths.The structure of epidote consists of repeating chains of AlO6 and AlO4(OH)2 octahedra that appear parallel to the y-axis and are connected by SiO4 and double Si2O7 tetrahedral groups. Outside of these chains are atoms of iron and aluminum in octahedral coordination along with calcium ions irregularly surrounded by eight oxygens.
https://digitalcommons.colby.edu/clas/2015/program/153