晶体生长技术.ppt
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晶体生长技术.ppt

晶体生长技术.ppt

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GrowingX-rayQualityCrystalsTopicstobeCovered•TheObjective:Getting“Good”Crystals•Whydoyouneedgoodcrystalsanyway?•TheRightAttitudetowardcrystalgrowing•Factorsaffectingcrystallization•Crystalgrowingtechniques外观(显微镜下观察)凸多面体、外形完整、晶面光洁、透明均匀、无裂缝、无瑕疵、表面无附着小晶粒和杂物。晶体大小有机晶体(C,H,N,O):~0.4×0.4×0.4mmorlarger,含重原子晶体:~0.3×0.3×0.3mmorsmaller不要大于0.4mm,不要小于0.05mm,通常0.2~0.3mm最好.Mightbemuchsmallerforsynchrotronradiation(veryverystrongsource)CrystalshouldbeimmersedintheX-rayincidentbeamwithdiameterof0.4mm(finefocus,mostpopular)or1.0mm(normalfocus)or0.1mm(forcon-focus)indiffractionexperimental.Conclusion•Thequalityandmeaningfulnessofyourresultsisdirectlydependentonthequalityofyoursamplecrystal.•Youcangetinformationfromabadcrystalstructure,butitwillbedifficulttopublish.•Takecrystalgrowingasaseriouspartofyourresearchproject–spendthetimeandefforttobesuccessful.•Therearemanysolventsandcrystalgrowingtechniquesavailable–usethem.