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Ein Titan-Tantaloxid mit Ti II : Ti 0,33 Ta 0,67 O 2 (TiTa 2 O 6 ) / A Titanium Tantalum Oxide of Ti II : Ti 0,33 Ta 0,67 O 2 (TiTa 2 O 6 )

1995; De Gruyter; Volume: 50; Issue: 8 Linguagem: Inglês

10.1515/znb-1995-0807

1865-7117

E.‐M. Peters, Hk. Müller‐Buschbaum,

Catalysis and Oxidation Reactions

Black single crystals of Ti 0.33 Ta 0.67 O 2 have been prepared by CO 2 -LASER techniques heating a mixture of TiO and Ta 2 O 5 to T > 2000 °C. The titanium tantalum oxide crystallizes with tetragonal symmetry, space group D 14 4h -P4 2 /mnm, lattice constants a = 4.7344(6) Å c = 3.0504(2) Å, Z = 2. Ti 0.33 Ta 0.67 O 2 represents the compound TiTa 2 O 6 with rutile structure because of the statistical distribution of Ti 2+ and Ta 5+ . The composition of rutile-type compounds is discussed in more general terms.