Sampleite
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Sampleite is orthorhombic, which means crystallographically, it contains 3 unequal axes with angles that are 90°. It belongs to the space group 2/m.[4] In a thin section it has a high surface relief and will have sharp boundaries with the surrounding medium. Sampleite is anisotropic and has visible pleochroism and birefringence.
It is characteristically found in earthy crusts in a highly sericitized rock and is present in highly oxidized conditions near the surface. When it occurs as micaceous rosettes and aggregates it can be associated with dendrites of manganese and iron oxides. Sampleite appears to be the most recent mineral deposited with the exception of gypsum.[5][6]
External links
Media related to Lua error in package.lua at line 80: module 'strict' not found. at Wikimedia Commons
References
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- ↑ Handbook of Mineralogy
- ↑ 2.0 2.1 Mindat.org
- ↑ 3.0 3.1 Webmineral data
- ↑ Campbell, T.J., Rapp, G.R., Roberts, W.L. (1990) Encyclopedia of Minerals (2nd Edition) 753 p. Library of Congress Cataloging, Washington D.C.
- ↑ Hulbert, C.S. "Sampleite A New Mineral." http://www.minsocam.org/ammin/AM27/AM27_586.pdf. Retrieved 2010-11-11
- ↑ "Sampleite Mineraology." http://www.wolframalpha.com/entities/minerals/sampleite/fx/0q/75/. Retrieved 2010-11-28