Question: Note from Table 2.3 that the most common minerals in the earths crust are all silicates. The basic building block is the silicon-oxygen tetrahedron (see

Note from Table 2.3 that the most common minerals in the earth’s crust are all silicates. The basic building block is the silicon-oxygen tetrahedron (see Fig. 2.4). What is the net electric charge of the tetrahedron and why is this geologically important?

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