Abstract
The polarization is calculated for donor-acceptor pair luminescence in SiC. Certain degrees of polarization depend only on the axial directions of the donor-acceptor pairs, thus permitting one to identify emission by such centers in SiC, or in other uniaxial crystals with tetrahedral bonds. A comparison with experiment is inconclusive because of insufficient resolution. The Prener-Williams conclusion about nearest-neighbor donor-acceptor pairs are discussed.

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