A proposed structure for nitrogen impurity platelets in diamond
A proposed structure for nitrogen impurity platelets in diamond
复制标题
金刚石中氮杂质片晶的拟议结构
DOI：
10.1088/0370-1328/84/6/306
复制
发表时间：
1964
影响因子：
1.2
通讯作者：
A. R. Lang
中科院分区：
文献类型：
--
作者：
A. R. Lang
综述了金刚石中氮片引起的晶格位移的证据。结果表明，含血小板的金刚石的面间距在任何意义上都可能与纯金刚石的面间距不同，这取决于布拉格反射的指数。先前提出的金刚石中取代氮的结构受到了批评。提出了一种具有6个碳原子和4个氮原子的血小板结构。在标准键长下，它产生与血小板正常的1.18 A的膨胀，与异常“尖峰”x射线反射的证据一致。它也没有产生与实验一致的密度变化。
Evidence on lattice displacements due to nitrogen platelets in diamond is reviewed. It is shown that interplanar spacings of a diamond containing platelets may differ in either sense from that of pure diamond, depending upon the index of the Bragg reflection. Structures previously proposed for substitutional nitrogen in diamonds are criticized. A platelet structure is proposed with six carbon and four nitrogen atoms per unit cell. With standard bond lengths it produces an expansion normal to the platelet of 1.18 A, in accord with evidence from anomalous `spike' x-ray reflections. It also produces no density change in agreement with experiment.