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alkalic |
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alkalic [‚al′kalĀ·ik]
Also known as alkali. (petrology) Of igneous rock, containing more than average alkali (K2O and Na2O) for that clan in which they are found. Of igneous rock, having feldspathoids or other minerals, such as acmite, so that the molecular ratio of alkali to silica is greater than 1:6. Of igneous rock, having a low alkali-lime index (51 or less). Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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