Strontium orthovanadate

Strontium Orthovanadate, Sr3(V04)2, is obtained in transparent, pale yellow leaves by heating together a mixture of vanadium pentoxide, sodium iodide, and strontium iodide.16... 

Vanadates For the isostructural strontium and barium ortho-vanadates the V-—0 vibrational frequencies decrease with increasing effective nuclear charge [51]. Similar orthovanadates with the apatite structure have for a given halogen ion decreasing frequencies of the VO4 ion in the order Ca>Sr >Ba ((62) and Table 4]. However, it is impossible to see any trend towards the tiivalent lanthanide cations (59). The IR bands are so wide in this case that small changes cannot be measured. 

Triple orthovanadates containing a divalent cation, trivalent rare earth, and tetravalent thorium or cerium, have been studied by Nabar et al. (1981 and 1983). The samples were prepared by mixing soluble compounds of the corresponding elements in water, evaporating the solution and heating at SOO C. The compounds MRTh(V04)3, where M = Ca, Cd, crystallize with the tetragonal zircon structure and those where M = Ba with the monoclinic monazite structure. Strontium and lead compounds show dimorphism (Nabar and Mhatre, 1982). 

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See also in sourсe #XX -- [ ]

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