Cr3+ ions in the BeAI6O10 (BHA) crystal give complicated luminescenoe spectrum with different fluorescence lifetimes from several miliseconds to several ten miorosceco-nds. "Null point phases" of these components measured by using chrono-speotroscopio technique indicate that the spectrum is due to two high-field single Cr3+-centers, Cr (Ⅰ), Cr (Ⅱ), and a low-field single Cr3+-center, Cr (Ⅲ). The crystal structure shows that, in an unit cell the possible chromium sites are 24 Cr (Ⅰ) with six distortion maners and 8 Cr(II), responsible for the main line emission, and 8 Cr(III) with a particular structure responsible for the broad band emission. At 77 K, some lens have been identified as the transitions of Cr(I), Cr(II) and Cr-pairs of the I-I and I-II types.