prov:value
| - Examples of other metals which may be used are chromium, molybdenum, vanadium, beryllium, silver, mercury, tin, lead, antimony, calcium, barium, manganese, cobalt, palladium, and platinum Additional examples of metals and salts are found in Mosher, Frank H. and Thomas, Arthur L., Phthalocyanine Compounds", N.Y. Reinhold, 1963, p. 104-141.
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