ðə hˈɛksɐhˌaɪdɹeɪt plˈeɪz ɐn ɪmpˈoːɹtənt ɹˈoʊl æz ɐn ˈæktᵻvˌeɪɾɚɹ ʌv ɡɹˈiːn fˈɑːsfɚz ɪn kˈʌlɚ tˌiːvˈiː tˈuːbz ænd ɪz ˈɔːlsoʊ jˈuːzd ɪn spˈɛʃəlɾi lˈeɪzɚz ænd æz ɐ dˈɑːpənt ɪn sˈɑːlɪdstˈeɪt dɪvˈaɪsᵻz.
The hexahydrate plays an important role as an activator of green phosphors in color TV tubes and is also used in specialty lasers and as a dopant in solid-state devices.