In Fig. 2.3, two models of halite are shown. One is an “exploded” model which enables one to see the location of the ions in the crystal structure. The model on the right shows the actual positioning of the ions next to each other. How do mineralogists know that the ions touch?
Answer to relevant QuestionsWhat are the two main factors that determine which ions of the many types present in a watery solution or in a magma will be bonded together to form minerals?Why are quartz and the feldspars (plagioclase and orthoclase) such hard minerals?What elements form the sulfide mineral group? Give an example.One of the common rock-forming minerals is plagioclase feldspar which contains variable amounts of Na and Ca in addition to Al, Si, and 0. Pure Na-plagioclase has the formula NaA1Si3O3. Because the sizes of Nat+1 and Cat+2 ...A quartz crystal is illustrated in Fig. 2.7. Which crystal system does it represent? (
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