"Negative" Crystals in Ice: A Method for Growth

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Science  31 Dec 1965:
Vol. 150, Issue 3705, pp. 1819-1821
DOI: 10.1126/science.150.3705.1819


Holes bounded by crystal-lographic faces, or "negative" crystals, may be made in ice by inserting a hypodermic needle and connecting it to a vacuum. The evaporation habit changes as a function of temperature and growth rate. This procedure is a simple way of producing mirror-smooth, uncontaminated, crystallographic surfaces in compounds which have high vapor pressure.