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硅酸铝(英语:aluminium silicate或英语:aluminosilicate)是一种硅酸盐,其化学式为Al2SiO5,由于多数硅酸盐的结构非常复杂,常不写成盐的形式而是写成金属各自的氧化物的形式,故硅酸铝常被写作Al2O3·SiO2。硅酸铝的密度为2.8到2.9克/厘米3,折射率为1.56,其莫氏硬度与矿石类型,含水量有关系,在4.5到7.5之间变化[1]。硅酸铝粉末常用作防火材料,例如在玻璃工业上用作筑玻璃窑。
由硅酸铝组成的常见矿物有三种,多存在于变质岩中。
这三种矿石成分都是硅酸铝,但结构有所不同,故互为同质异晶体,其中的蓝晶石和硅线石常被作为指准矿物(Index Mineral)来研究变质作用的强弱,当矿石中出现硅线石区域时,从相图中可见经历过高温高压过程,故得知变质作用十分强烈[2]。
This article uses material from the Wikipedia article "硅酸铝", which is released under the Creative Commons Attribution-Share-Alike License 3.0. There is a list of all authors in Wikipedia
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