prov:value
| - M is a metal selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, La, Lu, Ce, Ti, Zr, Hf, Pr, V, Nb, Ta, Nd, Cr, W, Pm, Mn, Re, Sm, Fe, Ru, Eu, Co, Rh, Ir, Gd, Ni, Tb, Th, Cu, Dy, Ho, Al, Tl, Er, Sn, Pb, Pd, Pt, Ga, In, Au, Ag, Li, Na, K, Rb, Cs, Mo, Tm, Bi, and Yb;
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