| http://www.w3.org/ns/prov#value | - The aim of this doping element or substituent is to endow the borate with luminescent properties or to reinforce them, and it can be selected from the group formed by aluminium, silicon, antimony, bismuth, and rare earths in particular including cerium, terbium, lanthanum, gadolinium, europium, thulium, erbium and praseodymium.
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