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mica

/ˈmʌɪkə/

noun
- 1. a shiny silicate mineral with a layered structure, found as minute scales in granite and other rocks, or as crystals. It is used as a thermal or electrical insulator.
Word Origin early 18th century: from Latin, literally ‘crumb’.
Derivatives
- 1. micaceous adjective
Scrabble Points: 8
- M
  3
- I
  1
- C
  3
- A
  1
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mica
Group of phyllosilicate minerals
Micas are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into fragile elastic plates. This characteristic is described as perfect basal cleavage. Mica is common in igneous and metamorphic rock and is occasionally found as small flakes in sedimentary rock. It is particularly prominent in many granites, pegmatites, and schi... Wikipedia
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