In some places, the strontium ion substitutes for the __________ ion within the calcium carbonate crystal structure.

Question

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Strontium is a chemical element with similar atomic properties to calcium, so it can substitute for calcium in some cases. In the case of calcium carbonate crystal structure, strontium can replace the calcium ion. Sodium and chlorine ions do not have similar properties to calcium and carbon does not hold the crystal structure together.

In Some Places, the Strontium Ion Substitutes for the __________