Thermal Expansion in YbGaGe
  Thermal expansion and magnetic susceptibility measurements as a function of temperature are reported for YbGaGe. Despite the fact that this material has been claimed to show zero thermal expansion over a wide temperature range, we observe thermal expansion typical of metals and Pauli paramagnetic behavior, which perhaps indicates strong sample dependence in this system. 
Svilen Bobev, Darrick J. Williams, J. D. Thompson, J. L. Sarrao