Answer :
The statement is false.
Do all minerals have the same crystal structure?
Crystal structure depends on the conditions under which the mineral forms. Polymorphs are minerals with the same chemical composition but different crystal structures. The conditions are such things as temperature (T) and pressure (P) because these affect ionic radii.
Why do all minerals have crystal structures?
Minerals are inorganic, naturally occurring substances that have crystalline structures. So it is a prerequisite to be a crystal in order to be a mineral. All minerals, therefore, form crystals.
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