The crystal structure of winstanleyite, TiTe3O8, from the Grand Central mine, Tombstone, Arizona

We have refined the crystal structure of winstanleyite from the type locality, the Grand Central mine, Tombstone, Arizona, in space group I2(1)/a3 to a final R index of 2.03%. Unit-cell parameters of the crystal examined are: a 10.965(1) Angstrom, V 1318.3(2) Angstrom(3), Z = 8. The structure previously reported for the synthetic analogue was confirmed, although a higher precision of refinement was achieved. The crystal-chemical environment of both Ti and Te cations is considered in relation with that in other tellurite structures.