论文信息 - A novel form of molybdenum ( V ) phosphate : t >-KMo 2 P 3013

A novel form of molybdenum ( V ) phosphate : t >-KMo 2 P 3013

A new form of molybdenum (V) phosphate has been isolated. The structure of this oxide has been determined from a single crystal X-ray diffraction study. It crystallizes in the triclinic space group PI with a= 8.846(8) A, b = 8.846 (9) A, c = 10.01(1) A, rx = 56.488(8) , f3 = 55.588(7), y == 68.868(7t, Z = 1. The refinement has led to R = 0.022 and Rw = 0.026 for 5243 reflections with I~ 30' (I). The structure consists of corner-sharing Mo06 octahedra, P20 7 tetrahedra forming tunnels running along [011] where the K + ions are located. One original feature of this structure, compared to the other forms rL, {3, y deals with the existence ofMo2P20 15 units formed of one P20 7 group sharing four of its corners with two Mo06 octahedra.

B. Raveau | A. Grandin | M. Borel | A. Leclaire

[1] B. Raveau,et al. A Mo(III) phosphate with a cage structure: NaMoP2O7 , 1988 .

[2] B. Raveau,et al. NaxMoP2O7, a mixed valence molybdenum diphosphate with a tunnel structure , 1988 .

[3] R. Haushalter,et al. CsMoP2O7: a molybdenopyrophosphate containing isolated Mo3+ cations , 1987 .

[4] R. Haushalter,et al. Crystal structure and magnetic properties of a new molybdenophosphate: AgMo5P8O33 , 1987 .

[5] B. Raveau,et al. K4MoV8P12O52, a tunnel structure characterized by an unusual valence of molybdenum , 1983 .

[6] W. Zachariasen,et al. Bond lengths in oxygen and halogen compounds of d and f elements , 1978 .

[7] R. D. Shannon. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides , 1976 .