Earth Sciences
Geology
Most plagioclase contains both Na and Ca

Most plagioclase contains both Na and Ca

Most plagioclase contains both Na and Ca. How is the apparent charge imbalance accommodated? (Hint: The solution involves more ionic substitutions.)

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How many integer solutions are there to the equation
x1 + x2 + 2x3 + x4 + x5 = 72
when
(a) xi 0,i = 1,...,5
(b) xi 1,i = 1,...,5

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Most plagioclase contains both Na and Ca

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