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Definition of Angle of extinction
1. Noun. The angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light.
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Lexicographical Neighbors of Angle Of Extinction
Literary usage of Angle of extinction
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Methods of Petrographic-microscopic Research, Their Relative Accuracy by Frederic Eugene Wright (1911)
"... of twice the angle of extinction (<£OZ)) for the plate in the horizontal
position, fixes the position of the second optic axis in the projection. ..."
2. Manual of Petrographic Methods by Albert Johannsen (1918)
"The angle ZE is the required angle of extinction provided Z, perpendicular to
the plane of projection, is parallel to a crystallo- graphic axis. ..."
3. The Observatory (1885)
"Mr. James Carpenter also used it, Haine, but the angle of extinction which Mr.
Carpenter gave differed entirely from the angle of extinction which I gave. ..."
4. Bulletin of the Department of Geology by Andrew C Lawson, University of California (1868-1952 (1906)
"In the Californian rocks I have met with many glaucophane- like amphiboles very
faintly colored, with small angle of extinction and variable ..."
5. Rock Minerals: Their Chemical and Physical Characters and Their by Joseph Paxson Iddings (1911)
"In general the angle of extinction in longitudinal sections reaches higher values
in pyroxenes than in similarly colored amphiboles. ..."
6. The Determination of Rock-forming Minerals by Eugen Hussak (1885)
"... the "angle of extinction;" eg, on augite the inclination C : c = 38°, ...
The angle of extinction can also be measured in relation to another known edge ..."
7. Tables for the Determination of the Rock-forming Minerals by John Walter Gregory, Grenville Arthur James Cole (1893)
"Distinguished from orthoclase by the angle of extinction—i 5° on oP - - MICROCLINE
... 1 The plagioclases may be distinguished by their angle of extinction ..."
8. Mineralogy: An Introduction to the Theoretical and Practical Study of Minerals by Alexander Hamilton Phillips (1912)
"In measuring the angle of extinction, at times it is quite impossible to determine
exactly the point at which there is no double refraction or the ..."
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