Carlsbad twin

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Figure 2: Twinning in feldspars.

Carlsbad twin

crystallography

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feldspar
Crystal structure
…common kinds of twinning—those designated Carlsbad twinning and albite twinning—are shown in the figure. Carlsbad twinning occurs in both monoclinic and triclinic feldspars; albite twinning occurs only in triclinic feldspars. Albite twinning, which is typically polysynthetic (i.e., multiple or repeated), can be observed as a set of parallel lines on…
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…common kinds of twinning—those designated Carlsbad twinning and albite twinning—are shown in the figure. Carlsbad twinning occurs in both monoclinic and triclinic feldspars; albite twinning occurs only in triclinic feldspars. Albite twinning, which is typically polysynthetic (i.e., multiple or repeated), can be observed as a set of parallel lines on…
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