1: 75 percent / Fe / acetic acid / 3 h / Heating 2: 81 percent / (NH4)2CO3 / ethanol; H2O / 6.5 h / Heating 3: 67 percent / BaCO3*8H2O / H2O / 48 h / Heating 4: H2O / 1 h / Heating View Scheme

1: 81 percent / (NH4)2CO3 / ethanol; H2O / 6.5 h / Heating 2: 67 percent / BaCO3*8H2O / H2O / 48 h / Heating 3: H2O / 1 h / Heating View Scheme

1: 67 percent / BaCO3*8H2O / H2O / 48 h / Heating 2: H2O / 1 h / Heating View Scheme

in water 1 h; Heating;