How Much You Need To Expect You'll Pay For A Good Crystal
How Much You Need To Expect You'll Pay For A Good Crystal
Blog Article
This idea applies equally in one, two, and 3-dimensional Areas. The complete crystal lattice might be built by frequently reproducing the sample of your unit cell in all Instructions.
Another exciting, and tasty, experiment is always to form substantial crystals working with sugar. By heating sugar with water after which permitting this Resolution evaporate on sticks, you may sort rock sweet from sugar crystals!
对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
Tetragonal: These crystals form prisms and double pyramids. The structure is sort of a cubic crystal, apart from a single axis is for a longer period than the other.
25If you're a Billy Crystal lover, you may love this movie.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》
当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。
30Three times went earlier, and I was astonished to check out it once more: each of the openings ended up sewed up by slim and white thread they usually appeared much like the ice crystal on Winter season's branches while in the north.
Crystals are very little greater than an ordered arrangement of molecules or atoms. Crystals come in many different sizes and styles, and each has unique features. The things they are created of determines how it can form.
13Nearly all pcs have a quartz-crystal clock to regulate their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
⑤化学稳定�?非常好，在常温下仅溶解于氢氟酸，不溶解于其它各类酸、碱。在高温高压条件下可溶解于碳酸钠溶液中。
The basic units of solids are both atoms or atoms that have combined into molecules. The electrons of an atom transfer in orbits that kind a shell structure across the nucleus. The shells are stuffed in a scientific buy, with check here Each and every shell accommodating only a little quantity of electrons. Unique atoms have unique numbers of electrons, which happen to be dispersed in a very characteristic Digital construction of loaded and partly loaded shells.
正常的水晶在生长时，多可以发现和柱形尖端棱线平行的生长纹（growth strains）。由于在地底、岩洞中的生长空间多狭窄，尤其在遇到地震时，或地壳变动时，甚至容易遭到其他矿石的挤压，常常会压迫产生不同的「晶面」。还有，当水晶还是在液态状的时候，常常也会包覆着其他的矿石、泥灰一起结晶成长，如金红石（稍后变成发晶）、火山泥灰（稍后变成幻影水晶）等等。所有的这些，都是「自然的一部分」，请不要视为「瑕疵」。
⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。
⑥白色的包裹体有蚀变的绿泥石、云母、愈合裂隙、水晶、方解石、透闪石等。