Pericline is a form of albite exhibiting elongate prismatic crystal. Pericline twinning is a type of crystal twinning which show fine parallel twin laminae typically found in the alkali feldspars sanidine, microcline and albite. The twinning results from a structural transformation between high temperature and low temperature forms. ...
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pericline 1. A variety of albite occurring in large, white opaque crystals. 2. A dome-shaped fold in sedimentary rock.
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