棱晶

Cu6Zr5, the basic cluster of the primary devitrification phase of Cu-based amorphous alloys, is selected as cluster model based the on structure heredity existing between amorphous alloys and primary devitrification phases.

根据非晶与其晶化相存在结构遗传关系，以Cu-Zr基非晶晶化相Cu10Zr7中的Cu6Zr5阿基米德反棱柱为团簇模型，利用离散变分方法从电子层次研究了Al元素对Cu基非晶合金团簇稳定性的影响。

It is not only important material for mica titanium nacreous pigment, high grade paint, pigment and cosmetic, but also the stuffing of plastic and rubber.

在生产过程中，我们以水为介质，保护了云母鳞片的晶面光泽，加工出来的云母粉，棱边清晰、折射性好，附着力强，径厚比大，并容易分散于许多液体中，是云母钛珠光颜料的重要基料，高档油漆、涂料、化妆品的功能性体质颜料、塑料、橡胶的优良填充料。

The space group of form 2 was not determined because it was difficult to get large single crystals. Form 3 crystals were obtained by using ammonium sulfate as precipitant.

当在晶型1的晶体生长条件中加入0.2M MgCl〓时，可得到六棱柱状的晶型2的晶体，由于很难得到大单晶，晶型2晶体的空间群未被确定。

The stellar dendrites you see here are the largest forms of snow crystal and perhaps the most beautiful, with the sectored plates coming in a close second, but there are also less photogenic simple prisms, columns, bullet shapes and needles and crystals that combine different types.

这里看到的星状树枝雪晶，是雪晶中个头最大，可能也是最漂亮的，有瞬间凝成的扇形分割星盘状躯体，有时也呈现简单的棱柱形、圆柱形、弹头形、针形和各式不同形状组合，只是镜头不易捕捉到。

By mineralogical analysis of Jidong magnetite concentrates what can be found is that: It is mainly composed of magnetite, concentrate grain is medium-coarse granular crystal texture, the most is subidiomorphic or xenomorphic, is chevron and granulated, surface of the concentrate is smooth, minority of concentrate has inclusion or intergrowth, grain inch normally is 0.05~0.16mm, there is incompletely cleavage in concentrate grain.

矿相分析表明：冀东磁铁精矿粉以磁铁矿为主，矿粉颗粒为中粗粒变晶结构，多为半自形或他形，呈尖棱碎粒状，其表面光洁平滑，少数有包裹体或连生体，粒径一般为0.05～0.16mm，矿粒存在不完全解理。

The fracture morphology were found that the interface bonds between ductile α-Ti matrix and the brittle Ti〓Si〓 phases were divided, which companied with little lancinated edge and small cleavage facets.

与其它元素相比，适量的硼改善Ti-Si共晶合金的塑性最为显著（ε〓=11.5％），其断裂机制为韧性的基体与第二相之间的界面解键，伴有少量撕裂棱和小解理面，属于准脆性断裂。

It is set forth that the symmetry of coordination anions in crystals is coincident with that of morphology if the boundaries of unit cell are divided with the faces,edges and angles of anionic coordination polyhedrons.

提出晶胞界线是以负离子配位多面体的面、棱和角为界面而划分的；晶体中负离子配位多面体的对称性与晶体形态的对称性是对应一致的。

It was found that the inorphology ofsulfates is related to the orientation of tetrahedral [SO4]2- in the crystal, i.e., the faces, the edges and faees of the tetrahedra normal to, are expected to grow slowly and observed in final form; in contrast, the faces, the vextices of the tetrahedra pointing to, usually grow fast, and will disappear.

晶体的结晶形貌与[SO4]2-四面体在晶体中的结晶方位密切相关，四面体的面和棱的法线（ L 2）所对向的晶面，生长速率慢，顽强显露，均属晶体的板面；四面体的顶角所指向的晶面，生长速率快，显露面积小，经常消失。

It was found that as the dopant amount of Fe3+ ions is up to 5.7mol%, the cell parameter and cell volume increase obviously, the sharing edges of octahedra and anionic fine structures of crystal plane (110) disappear gradually, and also the mean-square displacement of anions and lattice energy enhance abruptly.

结果表明，当掺杂量达5.7mol%时，晶胞参数a与晶胞体积明显增大，八面体共棱部分消失，(110)晶面中的阴离子精细结构逐渐消失，阴离子均方位移与体系能量也明显增大。

The results show that the growth rate of tetrapod ZnO is controlled by spiral growth and its crystallization is via VLS model. The condensation of tiny zinc droplets in zinc vapor is the key factor of the formation of tetrapod ZnO. The growth steps are formed on the terminated faces as zinc diffuses outwards and the elongation of whiskers continues until zinc inside the droplets is depleted. VS crystallization, which has little effect on the elongation growth, takes place on side faces of the whiskers and consequently makes the whiskers radius increase.

结果表明： T-ZnO晶须的结晶作用是气-液-固方式，晶须生长受螺旋生长机理控制；锌蒸气中产生凝聚生长的锌液滴是制备T-ZnO晶须的关键，锌从液滴内向外扩散在晶须的端面产生生长台阶，随着液滴内的原子向外不断扩散，针体部分就不断地伸长生长，当液滴内的原子全部消耗尽时，晶须便不再发生轴向生长；气-固方式的作用主要是促进晶须棱面生长而使晶须变粗，对轴向生长几乎没有影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。