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Deutsche Mikroklin {m} [min.] Synonyme

Englische microcline Synonyme

microcline Definition

Microcline
(n.) A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form.

microcline Bedeutung

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Microcline is an important igneous rock-forming tectosilicate mineral. It is a potassium-rich alkali feldspar. Microcline typically contains minor amounts of sodium. It is common in granite and pegmatites. Microcline forms during slow cooling of orthoclase; it is more stable at lower temperatures than orthoclase. Sanidine is a polymorph of alkali feldspar stable at yet higher temperature. Microcline may be clear, white, pale-yellow, brick-red, or green; it is generally characterized by cross-hatch twinning that forms as a result of the transformation of monoclinic orthoclase into triclinic microcline.