A polymorph can be defined as
A) a set of silicate minerals.
B) minerals that have the same chemical formula, but different crystal structures.
C) minerals that have the same crystal structure, but different chemical formulas.
D) minerals that have the same chemical formula and crystal structure, but exhibit different physical properties.
B
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Indicate whether this statement is true or false.
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According to Figure 12.43 when did the Rocky Mountains form?
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