caa a22 4500 378892886 CHVBK 20180305123459.0 cr unu---uuuuu 161128e20040301xx s 000 0 eng 10.1524/zkri.219.3.152.29091 doi (NATIONALLICENCE)gruyter-10.1524/zkri.219.3.152.29091 Structural aspects of the M1 and M2 phases in MoVNbTeO propane ammoxidation catalysts [Elektronische Daten] [Peter DeSanto, Douglas J. Buttrey, Robert K. Grasselli, Claus G. Lugmair, Anthony F. Volpe, Brian H. Toby, Thomas Vogt] The structures of M1 and M2 in MoVNbTeO propane ammoxidation catalysts have been solved using a combination of TEM, neutron powder diffraction, and synchrotron X-ray powder diffraction. The unit cell of M1 is Pba2 (No. 32) with a = 21.134(2) Å, b = 26.658(2) Å, c = 4.0146(3) Å and Z = 4. The formula unit is Mo7.8V1.2NbTe0.937O28.9. The unit cell of M2 is Pmm2 (No. 25) with a = 12.6294(6) Å, b = 7.29156(30) Å, c = 4.02010(7) Å and Z = 4. The formula unit is Mo4.31V1.36Te1.81Nb0.33O19.81. Tellurium sites in hexagonal channels of both phases are displaced toward vanadium-occupied framework sites, whereas Te in the heptagonal channel of M1 is near the channel center. The chemical topology resulting from oxidation states and Madelung site potentials presents active moieties for the ammoxidation of propane in M1 and propene in M2. EPR confirmed the presence of V4+ and possibly Mo5+ in M1 and V4+ in M2. © 2004 Oldenbourg Wissenschaftsverlag GmbH Crystallography nationallicence Inorganic chemistry nationallicence Organic chemistry nationallicence DeSanto Peter aut Buttrey Douglas J. aut Grasselli Robert K. aut Lugmair Claus G. aut Volpe Anthony F. aut Toby Brian H. aut Vogt Thomas aut Zeitschrift für Kristallographie - Crystalline Materials De Gruyter Oldenbourg 219/3(2004-03-01), 152-165 2194-4946 219:3<152 2004 219 zkri https://doi.org/10.1524/zkri.219.3.152.29091 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zkri.219.3.152.29091 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- DeSanto Peter aut NATIONALLICENCE 700 1- Buttrey Douglas J. aut NATIONALLICENCE 700 1- Grasselli Robert K. aut NATIONALLICENCE 700 1- Lugmair Claus G. aut NATIONALLICENCE 700 1- Volpe Anthony F. aut NATIONALLICENCE 700 1- Toby Brian H. aut NATIONALLICENCE 700 1- Vogt Thomas aut NATIONALLICENCE 773 0- Zeitschrift für Kristallographie - Crystalline Materials De Gruyter Oldenbourg 219/3(2004-03-01), 152-165 2194-4946 219:3<152 2004 219 zkri CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter