❤☺❤☺❤HEY MATE YOUR ANSWER IS HERE. ..❤☺❤☺❤The smallest building block of a crystal, CONSISTING of atoms, ions, or molecules, whose geometric ARRANGEMENT defines a crystal's characteristic symmetry and whose REPETITION in space produces a crystal lattice.❤☺❤☺❤PLZZ MARK ME BRAINLIEST ❤☺❤❤☺
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