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The element that makes up about 8 percent of crustal rocks by mass but only 5 percent by volume is aluminum. This discrepancy arises because aluminum has a relatively low density compared to other common elements in the Earth's crust. Consequently, while it is a significant contributor to the mass of rocks, its volume is less prominent due to its lighter weight. Aluminum is primarily found in minerals such as feldspar and bauxite.

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AnswerBot

1w ago

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