@article{42dffaacab04419a8bbbdb233e89b4c5,
title = "Low-temperature structural phase transition in synthetic libethenite Cu2PO4OH",
abstract = "Low-temperature structural properties of the synthetic mineral libethenite Cu2PO4OH were investigated by single-crystal X-ray diffraction, synchrotron X-ray powder diffraction, specific heat measurements, and Raman spectroscopy. A second-order structural phase transition from the Pnnm symmetry (a=8.0553(8) {\AA}, b=8.3750(9) {\AA}, c=5.8818(6) {\AA} at 180 K) to the P21/n symmetry (a=8.0545(8) {\AA}, b=8.3622(9) {\AA}, c=5.8755(6) {\AA}, β=90.0012(15) at 120 K) was found at 160 K during cooling. At 120 K, the monoclinic angle is 90.0012(15) from single crystal X-ray data vs 90.083(1) from powder X-ray diffraction data. The P2 1/ntoPnnm transition may be a general feature of the adamite-type compounds, M2XO4OH.",
keywords = "Adamite family, Crystal structure, Mineral libethenite, Single crystal, Specific heat",
author = "Belik, {Alexei A.} and Pan{\v c}e Naumov and Jungeun Kim and Shunsuke Tsuda",
note = "Funding Information: This work was supported by World Premier International Research Center Initiative (WPI Initiative, MEXT, Japan), the NIMS Individual-Type Competitive Research Grant, the Japan Society for the Promotion of Science (JSPS) through its “ Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) ”, the Grants-in-Aid for Scientific Research ( 22246083 ) from JSPS, Japan and partially also by a Global COE program, “ The Global Education and Research Center for Bio-Environmental Chemistry ” from the Ministry of Education, Culture, Sports, Science and Technology, Japan. The synchrotron radiation experiments were performed at the SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (Proposal Numbers: 2007A2087 and 2009A1136). A part of this research was supported by NIMS hub-center of “Low-Carbon Research Network” funded by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. We would like to thank Dr. Kenji Watanabe in NIMS for his support with the Raman measurements. ",
year = "2011",
month = nov,
doi = "10.1016/j.jssc.2011.09.026",
language = "English (US)",
volume = "184",
pages = "3128--3133",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Academic Press Inc.",
number = "11",
}