Studies on a new Rb3H9(PO4)4 crystal by T. Fukami and R. H. Chen

Crystal Research and Technology

Cryst. Res. Technol. 39, 131 (2004) - Abstract -

Studies on a new Rb₃H₉(PO₄)₄ crystal

T. Fukami and R. H. Chen*

Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan
*Department of Physics, National Taiwan Normal University, Taipei, Taiwan, 117, Republic of China

Keywords	crystal structure, DSC, X-ray diffraction, Rb₃H₉(PO₄)₄
PACS	61.66.Fn, 64.60.-i
DOI	10.1002/crat.200310160

A new type of trirubidium nonahydrogen tetraphosphate, Rb₃H₉(PO₄)₄, crystal has been crystallized. Differential scanning calorimetry (DSC) and X-ray diffraction measurements have been performed on the title compound. The crystal does not undergo any structural phase transition in the temperature range from 120 to 440 K except a melting transition at 399 K. The compound belongs to a monoclinic system with space group C2/c at room temperature. The structure is built on a framework of PO₄ tetrahedra linked by five types of O-H-O hydrogen bonds in the length range from 2.472(4) to 2.679(4) Å.

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