Two different compounds that have the same crystalline form and analogous chemical formulae are said to be
Correct answer: C. isomorphic
- A. polymorphic
- B. allotropic
- C. isomorphic
- D. anisotropic
Explanation
Isomorphous substances such as potassium sulphate and potassium chromate crystallise in the same shape because their ions are of similar size and charge, and they can even form mixed crystals. Polymorphism is the opposite situation, one substance existing in more than one crystal form, as calcium carbonate does as calcite and aragonite. Allotropy is polymorphism restricted to elements.
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About Crystalline Solids
Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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