Not known Factual Statements About Crystal
Not known Factual Statements About Crystal
Blog Article
Calcite crystals are frequently Employed in optical equipment, and in some cases the graphite in pencil lead are sheets of crystals that basically break aside layer by layer to jot down. Silica can form silicate crystals which might be The premise for quartz, mica, olivine, and all kinds of other crystals and minerals.
⒉棉、云雾或渣状包裹体、杂质在透明水晶内部有雾蒙蒙的现象或是感觉里面像有棉絮状、渣状物质一样的包裹体，这些包裹体的存在，影响水晶的整体美观。还有的水晶内局部含有黑斑或其他颜色的斑状物质，与水晶整体不协调，被视为水晶的杂质，有这种杂质的水晶是次品。
看做工：水晶制品加工过程分为两种，即磨工和雕工。如水晶项链、手链、耳环等属于研磨品；观音像、内画鼻烟壶等属于雕刻品。
Encyclopaedia Britannica's editors oversee subject parts during which they may have substantial expertise, no matter whether from years of encounter gained by working on that articles or by using examine for a complicated degree. They produce new content and validate and edit articles obtained from contributors.
根据美国已经了解的情况，统计局的专家和其他人口统计学家在他们的视野中提供了一个不可抗拒的水晶球。
They can eventually generate a great minimal uniform cluster of atoms, That is the entire process of increasing crystals. The greater they're able to appear jointly, the greater of a development will probably be obvious for the naked eye. Scientists can decide what mineral they are investigating by how the crystals form.
解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。
The elements are located in a variety of crystal packing preparations. The most typical lattice constructions for metals are These acquired by stacking the atomic spheres into one of the most compact arrangement.
水晶包裹体丰富多彩，从气体、液体到各种矿物质，甚至宝石，均可被包含于水晶内，各种包裹体所形成的景象更是变化万千。按照包裹体的内容，常把包裹体水晶分为一下八类：
A crystal technique refers to the classification of crystals depending on the geometric arrangement and symmetry in their lattice structures. You can find 7 key crystal techniques:
In the Cambridge English Corpus We say the chain topology inside the substantial w location functions as being the proverbial ' scratch-on-theglass ' needed inside the organic and natural chemistry laboratory to produce crystals. From your Cambridge English Corpus Continual-pressure and temperature molecular-dynamics simulations of crystals on the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From your Cambridge English Corpus As well as these, dust particles are already noticed in reduced-temperature plasmas, like Those people Utilized in plasma processing and plasma crystals. Within the Cambridge English check here Corpus The final Component of the e-book focuses on peculiarities of strongly coupled dusty plasmas, like the development of dust crystals and linked appealing forces. Within the Cambridge English Corpus Finish characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. In the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or more irregular, Key morphologies weren't observed. Through the Cambridge English Corpus See all samples of crystal These examples are from corpora and from resources on the web. Any views from the examples tend not to signify the viewpoint with the Cambridge Dictionary editors or of Cambridge College Press or its licensors.
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
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。
crystal Alteration is variable: absent in lots of crystals, in Other folks manufacturing dense sericite aggregates which can show some recrystallization effects to supply coarser-grained white mica. From the Cambridge English Corpus The tridymite crystals are rectangular or wedge-shaped and are occasionally organized in aggregates. From your Cambridge English Corpus Additionally, haloarchaeal cells were embedded inside of salt crystals underneath laboratory problems and subsequently analysed by light microscopy. With the Cambridge English Corpus The white clouds (ordinarily sparse) were being also greatly viewed as becoming composed of little crystals of drinking water ice, instead like cirrus inside our environment. Through the Cambridge English Corpus They can be found in evaporite salt lakes and may be trapped in salt crystals during evaporation. Through the Cambridge English Corpus Consequently, the cells (organelles and membranes) are ruined mechanically by ice crystals, resulting in Dying by mobile lysis. Through the Cambridge English Corpus The crystals have been Utilized in the primary or second orders of reflection. Within the Cambridge English Corpus Within our 8xperiments, the crystals ended up cubes by using a foundation space of 8 e mm. From your Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and pressure.