Not all crystals are equally crystalline. There are sometimes impurities, plus the ionic & covalent in between molecules can produce vastly various constructions outside of a similar substance. A fantastic illustration of this are diamonds and graphene.
the stable state of numerous easy substances, that have a regular form and surfaces arranged in comparable designs
A crystal construction focuses on how the atoms are organized In the crystal. On the other hand, crystallographers are interested in the overall shape and size of your crystal together with its external attributes. To accomplish this, they need to understand about the crystal process.
诗中道出一段唐代由盛变衰的史实。玄宗末年，杨贵妃得宠，三姐妹并封为国夫人。他们养尊处优，奢华至极，仆人用水晶盘将珍馐佳肴端到宴席上，美人觉得没有口味，懒得动筷子。作为“诗圣”作为“史诗”，紫驼一段写饮食之精美，不空发议论，只尽情揭露事实，无一刺讥语，无一慨叹声，却使人于以外得之：此诗之善讽也。以史为鉴，这样的世道，这样的人物，国家不出“安史之乱”那样的大祸反倒不正常了。
2She was wearing a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
对任何宝石来说，颜色都是非常重要的，水晶也不例外。如果是水晶晶体是有颜色的，如粉水晶、黄水晶、紫水晶等，其颜色评价的最高标准则是明艳动人，不带有灰色、黑色、褐色等其他色调。如粉水晶，颜色以粉红为佳；紫水晶，要求颜色为鲜紫，纯净不发黑；黄水晶，要求颜色不含绿色、柠檬色调，以金橘色为佳。对于发晶来说，晶体的颜色也是很重要的。相同发丝的金发晶，晶体完全无色（白水晶）和晶体略偏茶色，肉眼的视觉观感也是有差别的，所以前者的价格会高于后者。
Crystals are absolutely nothing more than an ordered arrangement of molecules or atoms. Crystals are available many various sizes and shapes, and every one has distinctive qualities. Whatever they are made of establishes how it is going to form.
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广义的包裹体是指宝石内部含有的与主晶宝石化学成分、物理性质等不同的物质。
天然性是水晶观赏石的基本特性。通常整体造型水晶矿物不饰雕琢就具备很高的观赏价值，但是包裹体水晶观赏石经常需要适当打磨抛光，这样更方便观赏水晶内部的包裹体。
Molecular Crystals: Overall molecules are bonded to each other in an structured way. A great illustration is actually a sugar crystal, which contains sucrose molecules.
⑦双色水晶：一种紫色和黄色共存一体的水晶，紫色、黄色之间界限较明显，分别占据晶块的一部分。
Binary crystals are found in a lot of structures. Some pairs of factors sort multiple construction. At space temperature, cadmium sulfide may possibly crystallize possibly within the zinc blende or check here wurtzite structure. Alumina also has two attainable structures at area temperature, α-alumina (corundum) and β-alumina. Other binary crystals exhibit distinctive constructions at unique temperatures. Amongst the most intricate crystals are People of silicon dioxide (SiO2), which has 7 unique structures at numerous temperatures and pressures; the commonest of those structures is quartz.