| http://www.w3.org/ns/prov#value | - For example used can be an oxide of Y, Ce, Ti, Zr, Nb, Ta, Co, Zn, Al, Si, Ge, Sn, Pb, Sb, Bi or Te, a nitride of Ti, Zr, Nb, Ta, Cr, Mo, W, B, Al, Ga, In, Si, Ge, Sn or Pb, a carbide of Ti, Zr, Nb, Ta, Cr, Mo, W or Si, a sulfide of Zn or Cd, selenide, telluride, a fluoride of rare earth such as Mg, Ca or La, a simple substance such as C, Si, Ge or a mixture of these.
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