| http://www.w3.org/ns/prov#value | - The zinc sulfide phosphors are preferably activated by copper and more preferably additionally activated by a metal element or plurality of metals selected from the group consisting of aluminum, silver, gold, magnesium, manganese, gallium, indium, scandium, iron, calcium and/or lead, by a rare earth or rare earth elements such as cerium, terbium, europium, gadolinium, samarium and/or praseodymium,
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