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  • Tungsten
  • Tungsten disulphide is used as a dry high temperature lubricant (stable to 500°C). (azom.com)
  • Tungsten disulfide is a dry, high-temperature lubricant, stable to 500C. (lanl.gov)
  • form
  • Pure nitrogen is stable and unreactive, so an unlikely source for organic molecules, but ammonia can easily react to help form the organic chemistry that underpins life. (newscientist.com)