THE ‘onion skin’ structure of carbonyl iron is well known to those who are familiar with powder metallurgy technique. W. D. Jones in his book “Principles of Powder Metallurgy” states that ...
iron (as Ferronyl [carbonyl iron 40mg] and Sumalate [ferrous asparto glycinate 10mg]) 50mg, iodine (as potassium iodide) 150mcg, magnesium (as oxide) 25mg, zinc (as oxide) 15mg, copper (as sulfate ...