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Structural properties of dense hard sphere packings

机译:致密硬球填料的结构特性

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The structural properties of dense random packings of identical hard spheres (HS) are investigated. The bond order parameter method is used to obtain detailed information on the local structural properties of the system for different packing fractions φ, in the range between φ = 0.53 and φ = 0.72. A new order parameter, based on the cumulative properties of spheres distribution over the rotational invariant ψ_6, is proposed to characterize crystallization of randomly packed HS systems. It is shown that an increase in the packing fraction of the crystallized HS system first results in the transformation of the individual crystalline clusters into the global three-dimensional crystalline structure, which, upon further densification, transforms into alternating planar layers formed by different lattice types.
机译:研究了相同硬球体(HS)的致密无规则堆积的结构特性。结合顺序参数方法用于获得有关系统的局部结构特性的详细信息,该系统对于不同的填充分数φ在φ= 0.53和φ= 0.72的范围内。提出了一个新的有序参数,它基于球体在旋转不变量ψ_6上的累积分布特性,来表征随机堆积的HS系统的结晶。结果表明,结晶HS体系的堆积分数的增加首先导致各个晶体簇转变为整体三维晶体结构,该晶体在进一步致密化后转变为由不同晶格类型形成的交替平面层。

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