Rubidium telluride or Rb<sub>2</sub>Te is a chemical compound of the elements rubidium and tellurium. It is a difficult compound to synthesize; this is in part due to the instability of the substance(Stöwe).
Rubidium telluride is prepared from the elements in liquid ammonia. It is a yellow-green powder that melts congruently at 775 °C (or 880 °C as two different values are reported).
This compound is very rare and there for are a limited number of suppliers. Pfaltz and Bauer sells Rb<sub>2</sub>Te for approximately 760 USD per gram (2010).
Rubidium telluride has found some uses as UV detectors in space.
Stöwe, K. and Appel S; Agnew. Chem. Int. Ed.2002, 41(5), p. 2726.
Sangester J. and Pelton AD; Journal of Phase Equilibria, 1997, 18(4) p. 394.