Structure of CsMo3P5.8Si2O25
Abstract
<h2>Acta Crystallographica Section C</h2><h3>Crystal Structure Communications</h3><h3>0108-2701</h3> <h2>research papers (inorganic compounds)</h2> Volume 41 Part 12 Pages 1719-1720 December 1985 <h2>Structure of CsMo 3 P 5.8 Si 2 O 25 </h2> A. Leclaire, J. C. Monier and B. Raveau 1719 Acta Cryst. (1985). C41, 1719-1720 Structure of CsMoaPs.8S|2025 BY A. LECLAIRE, J. C. MONIER AND B. RAVEAU Laboratoire de Cristallographie, Chimie et Physique des Solides, LA 251, 1SMRa-Universitd, 14032 Caen CEDEX, France (Received 19 December 1984; accepted 23 July 1985) Abstract. Mr= 1056.53, trigonal, P31c, a = b = 8.2642 (5), c = 17.559 (2) A, V= 1038.5 (2) A3, Z = 2, Dx = 3-778 Mg m-3, ~,(Mo Kfi) = 0.71069 A, g = 4.28 mm-1, F(000) = 992, T= 293 K. R = 0.028 for 715 independent observed reflections. The three-dimensional framework, built up from corner- sharing octahedra and tetrahedra delimiting wide tunnels, has the same shape and size as those of the TI, Rb or K compounds. It is observed that the thermal motion of the A ion in the tunnel decreases drastically as the size of the A ion increases. Introduction. The investigation of the system A- P-Si-Mo-O has shown the formation of molybdosilicophosphates AMo3Ps.8Si2025 (Leclaire,