A telltale sign of this phenomenon is the magnitude of the intensity distribution statistic “E squared minus 1” being lower than expected. The Yeats–Padilla (“pa-DEE-ya”) test detects this phenomenon’s hemihedral (“HEM-ee-HEE-dral”) form, which is an instance (10[1])of its merohedral (“MEER-oh-HEE-dral”) form. When this phenomenon occurs, three-by-three matrices describing it are required to perform structure factor refinement. This phenomenon is defined by two things: a “fraction,” which quantifies the relative volumes of the different domains, and a “law,” which is a set of symmetry operators. This phenomenon can occur when the crystal lattice point group has a higher order than the crystal structure point group. Orthoclase exhibits the Carlsbad form of this (10[1])phenomenon, (10[1])in which one domain is rotated 180 degrees (-5[1])about (-5[1])the [001] (“0-0-1”) axis. For (10[1])10 points, name this phenomenon in which multiple crystals (-5[1])of the same species (10[2])are joined together (10[1])in (10[1])different orientations. ■END■ (10[1]0[10])