A stable is crystalline if it's long-variety buy. Once the positions of the atom and its neighbours are recognised at a person stage, the location of every atom is thought precisely all through the crystal. Most liquids deficiency very long-assortment get, Whilst several have short-selection buy. Quick variety is outlined as the primary- or next-nearest neighbours of an atom. In many liquids the first-neighbour atoms are organized in the same framework as within the corresponding stable phase.
A elementary thought in crystal constructions is the device mobile. It is the smallest unit of volume that permits similar cells to generally be organized jointly to occupy all readily available space. The geometrical basis of all crystals would be the lattice. A lattice may be considered as a daily and infinite arrangement of points or atoms, wherever Every place or atom has A similar bordering ecosystem.
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
Massive crystals of diamond are valuable gemstones. The crystal has other intriguing properties; it's the best sound velocity of any sound and is the best conductor of warmth. Moreover diamond, another prevalent kind of carbon website is graphite, which happens to be a layered materials. Each and every carbon atom has three coplanar close to neighbours, forming an arrangement called the honeycomb lattice. Three-dimensional graphite crystals are obtained by stacking identical layers.
25If you're a Billy Crystal lover, you are going to like this film.如果你是比利·克里斯特尔的影迷，你就会喜欢这部电影。《柯林斯英汉双解大词典》
无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。
光泽：玻璃光泽。断口处为油脂光泽。光泽，指宝石表面对光线反射的一种光学性质。观察水晶的光泽，可用手握着它，以灯光或窗户投进来的光线看表面反射，透明水晶亮度与光泽强弱有关。
11I carefully opened the deal and located a crystal bell within.我小心地打开包裹，发现里面有一个水晶钟。
Metallic Crystals: Metals normally form metallic crystals, exactly where many of the valence electrons are totally free to maneuver throughout the lattice. Iron, by way of example, can form different metallic crystals.
幽灵水晶，分绿幽灵，红幽灵，白幽灵等，主要组成为绿泥石，其中绿幽灵属于珍贵品种。
say cheese a thing that a person who is using a photograph of you lets you know to convey so that your mouth would make The form of a smile
The arrangement of an atom’s electrons establishes its chemical properties. The Attributes of solids are often predictable from your Qualities of their constituent atoms and molecules, and the different shell buildings of atoms are thus responsible for the variety of solids.
14For illustration, Now we have Quartz crystal clocks and watches correct to inside one particular minute a year.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
水晶观赏石是天然水晶中最具代表的作品，具有其他宝石都不具备的观赏性。不论是玉石翡翠还是都要经过雕琢后次能体现他的价值，而水晶观赏石只需要将表面进行抛光，即展现出晶体内所包裹的物质，直接欣赏原汁原味的水晶石。