Event Title

Epidote

Presenter Information

Kate Kerin, Colby CollegeFollow

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

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Apr 30th, 2:00 PM Apr 30th, 3:55 PM

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.

http://digitalcommons.colby.edu/clas/2015/program/153