In reply to Axil Axil's message of Sun, 12 May 2019 20:28:44 -0400: Hi, [snip] >The externally low Melting point?: ?165 °C (329 °F; 438 K) would seem to >me to be a dead give-a-way to the presence of 25% volume of Fe3(CO)12 by >weight.
If the output from the reactor/furnace were cooled very rapidly, there could still be CO trapped inside that could form such crystals, where they would be exposed to neither air nor human contact. [snip] Regards, Robin van Spaandonk local asymmetry = temporary success