Which Common Group of Rock Forming Minerals Has Simultaneous Double

question 69

Multiple Choice

Which common group of rock forming minerals has simultaneous double substitution of Na⁺ for Ca⁺² and Si⁺⁴ for Al⁺³ in its structure and chemical formula?

• A) pyroxenes
• B) micas
• C) plagioclase feldspars
• D) carbonates

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