METHOD FOR PRODUCING CALCITE SINGLE CRYSTAL
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United States of America Patent
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Issued Date -
Jan 23, 2014
app pub date -
Feb 8, 2012
filing date -
Feb 8, 2011
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Abandoned
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Abstract
The objective of the present invention is to provide a method for producing a calcite single crystal which is appropriately fine in a large scale with no difficulty. The method for producing a calcite single crystal according to the present invention is characterized in comprising the steps of mixing raw material calcium carbonate with an ammonium nitrate aqueous solution to obtain a raw material mixed liquid, wherein pH of the ammonium nitrate aqueous solution is not less than 7.0 and not more than 8.0, a concentration of the ammonium nitrate aqueous solution is not less than 2 M, and a concentration of calcium carbonate in the raw material mixed liquid is not less than 4 g/L and not more than 16 g/L; heating the raw material mixed liquid at not less than 125° C.; and then gradually cooling the raw material mixed liquid.
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