B. Pecquenard et al., HYDROTHERMAL SYNTHESIS AND CHARACTERIZATION OF A NEW ALUMINUM VANADIUM-OXIDE HYDROXIDE AL-2(OH)(3)(VO4), Journal of materials chemistry, 8(5), 1998, pp. 1255-1258
A new aluminium vanadium oxide hydroxide analog of the mineral augelit
e has been prepared by hydrothermal treatment of a 1:1:2.65 aqueous so
lution of V2O5, Al(NO3)(3) . 9H(2)O, and TMAOH at 200 degrees C for 5
days. X-Ray powder diffraction data show that this phase crystallizes
with monoclinic symmetry with space group C2/m. The structure was solv
ed by using direct methods and then full profile Rietveld refinement w
as carried out; it's cell parameters are: a = 13.5634(2) Angstrom, b =
8.2267(2) Angstrom, c = 5.31232(9) Angstrom and beta = 112.741(1)degr
ees in space group C2/m. The structure contains clusters of edge shari
ng AlO6 octahedra and AlO5 trigonal bipyramids. These clusters are joi
ned together by VO4 tetrahedra.