Question

Existence of CaCO3 in trigonal and orthorhombic forms is an example of

Answer 1

Answer:

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the crystal structure of calcium carbonate is trigonal..

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Answer 2

Answer: The existence of CaCO₃ in trigonal and orthorhombic forms is an example of polymorphism.

Explaination:

• Polymorphism is the phenomenon where a substance can exist in different crystal structures or forms while having the same chemical composition. In this case, calcium carbonate (CaCO₃) can crystallize in two different forms: trigonal and orthorhombic.

• In the trigonal form, calcium carbonate crystals have a rhombohedral shape with threefold symmetry, while in the orthorhombic form, the crystals have a rectangular shape with twofold symmetry.
• Despite having different crystal structures, both forms of calcium carbonate have the same chemical composition, with one calcium atom, one carbon atom, and three oxygen atoms in each molecule.

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