Sun November 20, 2011 By: Sidharth Gupta

what is crystal twilling ?

Expert Reply
Mon November 21, 2011

It is crystal twinning not twilling.

Crystal twinning occurs when two separate crystals share some of the same crystal lattice points in a symmetrical manner.

The result is an intergrowth of two separate crystals in a variety of specific configurations. A twin boundary or composition surface separates the two crystals. Crystallographers classify twinned crystals by a number of twin laws. These twin laws are specific to the crystal system. The type of twinning can be a diagnostic tool in mineral identification.

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