架狀
具有由一系列[ZO4]四面體以角頂相連成三維無(wú)限伸展的架狀硅氧骨干的硅酸鹽礦物。除極個(gè)別例外，幾乎所有架狀硅氧骨干中的每個(gè)[ZO4]四面體均以其全部的四個(gè)角頂與相鄰四面體共用而相連接，所有的O2-全為橋氧。當(dāng)Z全部為Si4+時(shí)，硅氧骨干本身電荷以達(dá)平衡，不能再與其他 陽(yáng)離子相鍵合。 石英族礦物的 晶體結(jié)構(gòu)正好就是如此。因此，從化學(xué)組成上石英族礦物（SiO2）歸屬于氧化物礦物。但不少人從結(jié)構(gòu)角度把它們歸屬于架狀結(jié)構(gòu)硅酸鹽礦物。為了能有剩余的負(fù)電荷再與其他金屬陽(yáng)離子相結(jié)合，一般的架狀硅氧骨干中均有部分Si4+被Al3+或較少被Be2+、B3+等 類(lèi)質(zhì)同象替代。故絕大多數(shù)架狀結(jié)構(gòu)硅酸鹽礦物都是 鋁硅酸鹽。與骨架相結(jié)合的金屬 陽(yáng)離子主要是電價(jià)低而半徑大的K+、Na+、Ca2+、Ba2+等。
Cage
具有由一系列[ZO4]四面體以角頂相連成三維無(wú)限伸展的架狀硅氧骨干的硅酸鹽礦物。除極個(gè)別例外，幾乎所有架狀硅氧骨干中的每個(gè)[ZO4]四面體均以其全部的四個(gè)角頂與相鄰四面體共用而相連接，所有的O2-全為橋氧。當(dāng)Z全部為Si4+時(shí)，硅氧骨干本身電荷以達(dá)平衡，不能再與其他陽(yáng)離子相鍵合。
Silicate mineral with a series of [ZO4] - shaped silicon - oxygen - shaft, connected to the top of the corner of the top of the frame. In addition to a very few exceptions, almost all of the [ZO4] in the frame of the silicon oxide backbone is shared with the adjacent tetrahedral, and all the O2- is the bridge oxygen. When the Z is all Si4+, the silicon oxide backbone itself charges in order to balance, and can not be bonded with other cations.
石英族礦物的晶體結(jié)構(gòu)正好就是如此。因此，從化學(xué)組成上石英族礦物（SiO2）歸屬于氧化物礦物。但不少人從結(jié)構(gòu)角度把它們歸屬于架狀結(jié)構(gòu)硅酸鹽礦物。為了能有剩余的負(fù)電荷再與其他金屬陽(yáng)離子相結(jié)合，一般的架狀硅氧骨干中均有部分Si4+被Al3+或較少被Be2+、B3+等類(lèi)質(zhì)同象替代。故絕大多數(shù)架狀結(jié)構(gòu)硅酸鹽礦物都是鋁硅酸鹽。與骨架相結(jié)合的金屬陽(yáng)離子主要是電價(jià)低而半徑大的K+、Na+、Ca2+、Ba2+等。
The crystal structure of the quartz crystal is exactly the case. Therefore, from the chemical composition of upper Yingzu minerals (SiO2) belong to the oxide minerals. But a lot of people from the structural point of view they belong to the structure of the structure of silicate minerals. In order to be able to have the remaining negative charge and then combined with other metal cations, the general framework of the silicon oxide backbone in the Al3+ or less are Be2+, B3+, and other similar to the same as the replacement. Therefore, the vast majority of frame structure of silicate minerals are aluminum silicate. The metal cation which is combined with the framework is mainly the K+, Na+, Ca2+, Ba2+, etc.. |
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