...The structure represented by the repetition of AB has the same format as that of AC, and since it creates a hexagonal crystal lattice, this structure is called hexagonal closest packing of spheres (abbreviated as hcp). The stacking of the repetition of ABC (or ACB) creates a face-centered cubic lattice structure with the diagonal perpendicular to the layers, so this structure is called cubic closest packing of spheres (abbreviated as ccp). In both of the above two types, all the spheres can be expressed as equivalent points of one space group (crystal). ... *Some of the terminology that refers to "cubic closest packing of spheres" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ABの繰返しで表されるものは,ACのそれと同じ型式になり,六方晶系の格子がつくられるので,この様式を六方最密充てん構造hexagonal closest packing of spheres(hcpと略す)という。またABC(またはACB)の繰返しの積み重ね方は,層に垂直な方向を対角線とする面心立方格子の構造となるので,この様式を,立方最密充てん構造cubic closest packing of spheres(ccpと略す)という。以上の2型式は,ともにすべての球が,空間群(結晶)の1種の同価点で表せる。… ※「cubic closest packing of spheres」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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