Possible Transition in D-Valine and L-Valine Single Crystal Samples
YANG Hongshun, LOU Fengming, WANG Wenqing1, SHENG Xiangrong1, ZHUANG Zhizhong, SHI Lei2, CHEN Zhaojia
Department of Physics, University of Science and Technology of China, Hefei 230026
1Department of Technical Physics, Peking University, Beijing 100871
2The Center of Structure & Element Analysis, University of Science and Technology of China, Hefei 230026
Possible Transition in D-Valine and L-Valine Single Crystal Samples
YANG Hongshun;LOU Fengming;WANG Wenqing1;SHENG Xiangrong1;ZHUANG Zhizhong;SHI Lei2;CHEN Zhaojia
Department of Physics, University of Science and Technology of China, Hefei 230026
1Department of Technical Physics, Peking University, Beijing 100871
2The Center of Structure & Element Analysis, University of Science and Technology of China, Hefei 230026
Abstract： The specific heats and temperature dependence of the x-ray powder diffractions for the D-valine and the L-valine single crystal samples have been studied. It is found that there is a specific heat jump at 272.0K for the D-dine samples but no jump at the same temperature for the L-dine sample. The lambda like transition means that the co-operative effect is involved in this transition. There is no crystal structure transition in the temperature range of 123-293K for the D-dine sample. The transition of the D-valine sample might be the possible D-L transition which is proposed by Abdus Salam.
YANG Hongshun;LOU Fengming;WANG Wenqing;SHENG Xiangrong;ZHUANG Zhizhong;SHI Lei;CHEN Zhaojia
. Possible Transition in D-Valine and L-Valine Single Crystal Samples[J]. 中国物理快报, 1995, 12(5): 297-300.
YANG Hongshun, LOU Fengming, WANG Wenqing, SHENG Xiangrong, ZHUANG Zhizhong, SHI Lei, CHEN Zhaojia
. Possible Transition in D-Valine and L-Valine Single Crystal Samples. Chin. Phys. Lett., 1995, 12(5): 297-300.
1995, Vol. 12 
