An unusual density evolution between SrCdB2O5 polymorphs.
Owing to the effect of atomic vibrations, a high-temperature phase usually features a relatively smaller density when compared with a low-temperature phase. In this work, a new SrCdB2O5 phase has been discovered. According to the crystallization temperature from low to high, the new SrCdB2O5 phase can be regarded as the high-temperature β-SrCdB2O5 phase. The density of β-SrCdB2O5 is obviously larger than that of α-SrCdB2O5, meanwhile β-SrCdB2O5 is energetically favored. This unusual density evolution phenomenon has been investigated. In addition, the Pb(2+)-doped compounds, PbxSr1-xCdB2O5 (x = 0.125, 0.25, 0.375, 0.5), have also been investigated by powder refinement.
Key Laboratory of Functional Materials and Devices for Special Environments of CAS; Xinjiang Key Laboratory of Electronic Information Materials and Devices; Xinjiang Technical Institute of Physics & Chemistry of CAS, 40-1 South Beijing Road, Urumqi 830011, China. wuhp@ms.xjb.ac.cn slpan@ms.xjb.ac.cn.
Xingwen
X
Zhang
Zhengyang
Z
Zhou
Hongping
H
Wu
Shilie
S
Pan
Chen
C
Lei
Lu
L
Liu
Zhihua
Z
Yang
D001895:Boron / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007854:Lead / Q000737:chemistry; D008958:Models, Molecular; D010100:Oxygen / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D013696:Temperature
D011108:Polymers; D002104:Cadmium; D007854:Lead; D001895:Boron; D010100:Oxygen; D013324:Strontium