Piccirilli s 1935 Pyrex glass relief sculpture " Advance Forever, Eternal Youth " over the entrance of the Palazzo d'Italia at Rockefeller Center was removed during World War Two when the Italian inscriptions were used by Mussolini, and it was associated with fascist iconography.
22.
Diamond's very high scratch resistance and thermal conductivity, combined with a lower coefficient of thermal expansion than Pyrex glass, a coefficient of friction close to that of Teflon ( Polytetrafluoroethylene ) and strong lipophilicity would make it a nearly ideal non-stick coating for cookware if large substrate areas could be coated economically.
23.
The pentagonal bipyramidal iodine heptafluoride ( IF 7 ) is an extremely powerful fluorinating agent, behind only chlorine trifluoride, chlorine pentafluoride, and bromine pentafluoride among the interhalogens : it reacts with almost all the elements even at low temperatures, fluorinates Pyrex glass to form iodine ( VII ) oxyfluoride ( IOF 5 ), and sets carbon monoxide on fire.
