Rhodium sinadari ne na ƙarfe mai alamar Rh da lambar atomic 45 a jadawalin sinadarai. Yana daga cikin rukunin transition metals, sannan kuma yana cikin jerin sinadarai guda shida da ake kira Platinum Group Metals (PGMs), waɗanda suka haɗa da ruthenium, rhodium, palladium, osmium, iridium, da platinum. Waɗannan sinadarai suna da alaƙa sosai ta fuskar siffofi, musamman wajen jure lalacewa, ƙarfin jiki, da kuma muhimmancinsu a masana’antu da binciken kimiyya.