1. Binary compounds with sulfur, selenium, and tellurium also exist.2. Iron forms binary compounds with the halogens and the chalcogens. 3. Beryllium forms binary compounds with many non-metals. 4. Binary compounds such as tungsten carbide or boron nitride can be very refractory.5. More so than the other alkali metals, caesium forms numerous binary compounds with oxygen. 6. For germanium only 5 linear chain binary compounds are known as gases or volatile liquids. 7. In particular, it forms binary compounds , named fluorides, with all said elements except argon. 8. With a melting point of about 3900 �C it is one of the most refractory binary compounds known. 9. Binary compounds of metal oxides without any intentional impurity doping have also been developed for use as TCOs.10. The " Stock system, " first published in 1919, was a means of nomenclature on binary compounds .
