Clay minerals can be grouped into several classifications based on their characteristics. One of the groups of clay minerals is kaolin, which has one tetrahedral sheet and one octahedral sheet or can also be identified as a 1:1 clay mineral. Kaolinite, dickite, halloysite, and nacrite are the types of clay minerals that are included in the kaolin group minerals. They all have the same chemical formula of Al2Si2O5(OH)4.
1、高岭石
As one of the most ordinary kinds of clay minerals, the mining sites of kaolinite can be found in a lot of countries around the world. In fact, they are spread in every continent but the south pole’s continent, Antarctica.
In the United States, kaolinite can be mined in Brazil and the United States. Across the Atlantic ocean, the mines can be found in 南非 and Tanzania. In Europe, the United Kingdom, France, Germany, Bulgaria, Spain, and the Czech Republic have the mines as well.
此外,亚洲也有许多国家的高岭石矿。这些国家是 中国, 印度, 巴基斯坦, 马来西亚, 印度尼西亚, Vietnam, Bangladesh, Iran, 和 South Korea. Then, the smallest continent, Australia, also has kaolinite mines in it.
相关的: 白色粘土矿物高岭石-你需要知道的一切
2、地开石
Dickite was discovered for the first time in 1888 on the island of Anglesey, Wales. It happened when a Scottish metallurgical chemist, Allan Brugh Dick, was doing research there on kaolin. The name was taken from the chemist’s name about five years after the chemist passed away in 1931 after the clay mineral was concluded to be a different kind.
地开石具有相同的化学式,其化学成分百分比也与其他高岭土类矿物相似。它由46.54%的二氧化硅组成2, 39.50% of Al2O3, and 13.96% of H2O.
地开石遍布威尔士的几个地区,这些地区具有高温和极低的压力,类似于其故乡安格尔西的特征。这种粘土矿物也可以在南美洲发现,如牙买加、墨西哥的圣胡安尼托、美国的犹他州和堪萨斯州。
3、埃洛石
埃洛石 通常在附近有碳酸盐岩的地方发现。埃洛石尤其存在于火山灰和玻璃中。粘土矿物是由热液随流动水的变化而形成的。它通常发生在热带和亚热带气候,如美国科罗拉多州。
Besides those characteristics and where to find it, it’s been said that the precise structure hasn’t been shown. Another interesting deal about halloysite is that while kaolinite, dickite, and nacrite come in plate form, halloysite materializes in a tubular form, with the possibility to have a single layer of its sheets according to research in USGS .
埃洛石与高岭土一样,在未来的绿色技术应用和医疗领域的生物医学应用方面具有巨大潜力。
4、珍珠层
Nacrite is a native German clay mineral. Specifically, it occurred for the first time in 1807 in Saxony, Germany. The name of the clay mineral is derived from nacre produced by nacrite’s surface when it receives direct sunlight.
就形态而言,珍珠层具有多晶型或几种不同的形态。由于其种类繁多,在中国,珍珠层被当作宝石交易并用于雕刻。虽然珍珠层是德国本土的粘土矿物,但在加拿大甚至意大利也发现了珍珠层,其形式和前面提到的不同。
5、阿洛芬
There is one more clay mineral that comprises the kaolin, which is chemically similar to kaolinite but in terms of forms. This one is found as amorphous or not having a solid crystal form, or simply shapeless. According to Britannica, the mineral is called allophane. Allophane has chemical orders that contain silica, alumina, and water.
allophane最初位于德国,类似于nacrite,在法国、希腊和冰岛也有发现。根据科学研究,当阿罗芬与伊莫戈利特同时出现时,它可以用来提高土壤储存。未来与合作伙伴伊莫戈利特一起使用阿洛芬的研究可能会支持解决气候变化问题的技术开发。
虽然上述所有事实看起来很复杂,但作为高岭土族矿物,它们都隐藏着一个有益的目的,就像 高岭土. 不仅适用于普通行业,如 建设 但除此之外,世界越来越需要对可再生或绿色技术的支持。
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