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Hemimorphism
HEMIMORPHISM

Definitions:

i. In crystallography, refers to minerals in crystal classes with merohedral symmetry such that crystal forms are different at opposite ends of the crystallographic axes, thus permitting polar crystal properties; e.g., hemimorphite, zincite.

ii. The property of certain crystals in which there is no element of symmetry present to cause the repetition of upper-hemisphere faces in lower hemisphere.

iii.In crystallography, the property of having the opposite extremities unlike in their planes or modifications.
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See perfect type (1).

See perfect crystal (1).
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See perfect property (4).

See perfect particularness.
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See perfect characteristic (1).

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