DAST twin crystal, process for producing the same, and use thereof
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United States of America Patent
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Nov 11, 2008
Grant Date -
Feb 1, 2007
app pub date -
Jul 21, 2006
filing date -
Jan 23, 2004
priority date (Note) -
Expired
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Abstract
Noble crystal of 4-dimethylamino-4-stilbazolium tosylate (DAST) useful as an electro-optical element. A DAST crystal having a size effective for use as an electro-optical element is provided by a twin crystal of DAST. The twin crystal of DAST can be obtained according to a seed crystallization method or a slope crystal growing method.
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