Calcite crystals in many cases are Employed in optical gear, and perhaps the graphite in pencil direct are sheets of crystals that in essence crack apart layer by layer to write. Silica can type silicate crystals which happen to be The premise for quartz, mica, olivine, and many other crystals and minerals.
12He tried all over again in several other cities and succeeded with Crystal Caramels.他又在其他几个城市再次尝试，并成功制出了水晶焦糖。
A simple idea in crystal buildings is the device mobile. It's the smallest device of volume that allows equivalent cells to generally be stacked together to fill all Room. By repeating the sample of the device mobile time and again in all Instructions, your entire crystal lattice might be created. A cube is the simplest example of a unit mobile. Two other illustrations are shown in Determine one. The 1st may be the unit cell to get a deal with-centred cubic lattice, and the second is for just a system-centred cubic lattice. These buildings are explained in the subsequent paragraphs.
Tetragonal: These crystals kind prisms and double pyramids. The structure is sort of a cubic crystal, apart from one particular axis is longer than one other.
断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。
SMART Vocabulary: relevant phrases and phrases Glass blower blowpipe bulletproof glass Reduce glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See additional outcomes » It's also possible to find similar click here phrases, phrases, and synonyms during the subjects:
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。
24I intend to make my which means crystal crystal clear.我想把我的意思解释得清清楚楚。《牛津词典》
22Working from what America presently is aware about alone, the bureau's specialists and other demographers provide an irresistible, if clouded, crystal ball amid their visions.
There's two this kind of doable periodic arrangements. In Just about every, the first layer has the atoms packed right into a airplane-triangular lattice in which every atom has six instant neighbours. Determine two exhibits this arrangement for your atoms labeled A
The arrangement of an atom’s electrons establishes its chemical Qualities. The Attributes of solids are usually predictable through the Houses in their constituent atoms and molecules, and the several shell buildings of atoms are hence liable for the range of solids.
压电性：水晶晶体受到压力时会产生电荷；反之，受到电压作用时，晶体会产生频率很高的振动。水晶具有可使压力与电荷相互转移的性能，称压电性。
水晶的价值根据品质、块体的大小、美感和产量多少的不同相差较大。遇到好的天然水晶要敢于下手，但好的水晶一般大家都想得到，值与不值，就要看经验了。由于天然水晶的开采和制作原因，没有瑕疵的水晶很难得到，纯净的饰品要达到与合成水晶媲美的品质，实在是很难得。另外，由于水晶的特性，在佩戴过程中，也会改变其等级，比如因为某种原因，有可能会逐渐产生较大裂纹。