相同配方的正二十面體準晶Cd84Yb16樣品，其電阻比R(T)/R(300K)隨溫度的變化差異很大，而用Ag與In等份取代Cd的正二十面體準晶Ag42In42Yb16樣品也是相同的情形。試著探索這物理特性背後的機制，已排除了以下因素 － 準晶中Yb的實際含量、Cd-Yb樣品中Cd雜相的含量、Yb中磁性Yb3+的含量與製程中樣品冷卻的速度，並針對樣品中的雜相與樣品的微觀結構等因素提出看法。在實驗過程中發現了兩種相變，1/1類準晶Cd86Yb14在110K發生order-disorder相變，而Ag42In42Yb16樣品在2K~4K間發生了超導相變。

The temperature dependence of the normalized resistance R(T)/R(300K)
of both Cd84Yb16 and Ag42In42Yb16 quasicrystals have been studied and compared. It was found that the temperature coefficient of the R(T)/R(300K) for both quasicrystals can be positive, negative, or negative at high temperature and positive at low temperature. To understand this anomalous behavior, we have tried to study the influence of the composition of samples, the impurity phase of Cd alone, the number of magnetic Yb3+ in Yb element, and the formation of the quenched process for melted samples on the temperature dependent behavior of the resistance of both quasicrystals. We found no factors mentioned above can be related to the anomalous behavior.
We discovered two phase transitions, superconductors in Ag42In42Yb16 at 2~4K and the order-disorder transition in 1/1 approximants Cd86Yb14 at 110K.

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