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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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1992-09-03
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6 lines
A silicate mineral, KAlSi2O6, occurring
frequently in some potassium-rich volcanic
rocks. It is dull white to grey, and usually
opaque. It is used as a source of potassium
for fertilizer.