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[li-pid-l-ahyt, lep-i-dl-] /lɪˈpɪd lˌaɪt, ˈlɛp ɪ dl-/
a mineral of the mica group, potassium lithium aluminum silicate, commonly occurring in lilac, rose-colored, or whitish scaly masses: an ore of lithium.
1790-1800; lepido- + -lite Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for lepidolite
  • lepidolite, a third mica species, often has an attractive lilac color.
British Dictionary definitions for lepidolite


/lɪˈpɪdəˌlaɪt; ˈlɛpɪdəˌlaɪt/
a lilac, pink, or greyish mica consisting of a hydrous silicate of lithium, potassium, aluminium, and fluorine, containing rubidium as an impurity: a source of lithium and rubidium. Formula: K2Li3Al4Si7O21(OH,F)3
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for lepidolite

the most common lithium mineral, basic potassium and lithium aluminosilicate; a member of the common mica group. It is economically important as a major source of lithium. Because it is one of the few minerals containing appreciable amounts of rubidium, it is useful in determining geological age according to strontium-rubidium ratios. Lepidolite occurs almost exclusively in granite pegmatites. For chemical formula and detailed physical properties, see mica (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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