What is the composition of (potassium) orthoclase feldspar? a.k.a "K-Spar"?

and why is it called K-spar???

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  • MQ
    Lv 4
    10 years ago
    Favorite Answer

    K (periodic table symbol for potassium).

    the general formula (K,AL)Si3O8 where the relative amounts of K and Al can vary to produce different types of feldspar.

    K-Spar is sort of a shorthand or slang way of referring to potassium feldspar that geologists use. It just makes keeping notes and other writings easier for those of us who use the term frequently.

    Source(s): Geographer
  • Anonymous
    10 years ago

    K is the symbol for the element Potassium so K-Spar for short

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