无定型（amorphous forms）为无结晶结构的药物，无晶格束缚，自由能大，所以溶解度和溶解速度较结晶型大。
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Iron and aluminum hydroxides are present in soils in both crystalline and amorphous forms.
土壤中出现有结晶和非结晶形式的铁和铝的氢氧化物。
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Elemental carbon had long been thought to exist in only three physical forms: graphite, diamond and an amorphous form, of which charcoal is an example.
ECONOMIST: Space-age soot
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