| http://www.w3.org/ns/prov#value | - (Ge1???yTiy)2???x(PO4)3 where X???0.8 and 0???B???1.0, and where M is an element selected from the group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb and/or and Li1+x+yQxTi2???xSiyP3???yO12 where 0???X???0.4 and 0???Y???0.6, and where Q is Al or Ga.
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