The mechanism of tapering on KDP-type crystals
作者： B. Dam , P. Bennema , W.J.P. Van Enckevort
DOI: 10.1016/0022-0248(86)90254-X
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摘要: The anomalous wedge-like shape of KH2PO4-type single crystals, also called tapering, is reconsidered. A reformulation the problem given on basis a detailed observation boundary between prismatic and pyramidal growth sectors by means transmitted light polarization microscopy. narrowing both can be identified to constitute tapering. first being due an overall retardation layers caused impurity adsorption, whereas inability reach crystal edge. explained in terms change electrostatic parameters near edge or assuming fundamental roughness connected net analysis shows presence two equally stable {022} nets parallel faces. In polar environment this equality broken, favouring {011} double layer mechanism which explain principle low segregation coefficient for three-valent positive metal ions sector.
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