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of the impure material; the regular structure of the crystal tends to favor the desired material and exclude other kinds of particles.
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can be refined in this way as well, by being cooled and/or compressed until they liquefy. Gases and liquids can also be refined by
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with residues and by-products. The term is broad, and may include more drastic transformations, such as the reduction of
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that is almost in a usable form, but which is more useful in its pure form. For instance, most types of natural
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will burn straight from the ground, but it will burn poorly and quickly clog an
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are often used to remove impurities of particular types.
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120:Learn how and when to remove this message
258:became available when Henry Theuerer of
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58:adding citations to reliable sources
262:adapted Pfann's method to silicon.
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213:can be refined by growing
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248:William Gardner Pfann
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69:"Refining"
308:Gristmill
279:petroleum
260:Bell Labs
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344:See also
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