Pericline

Pericline also refers to a doubly plunging anticline or syncline.

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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References

• Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, p. 100, 20th ed., ISBN 0-471-80580-7
• Tsatskis, I. and E.K.H. Salje (1996) Time evolution of pericline twin domains in alkali feldspars, American Mineralogist, Volume 81, pages 800-810 PDF
• Mindat with location data