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J. Akimoto, Y. Gotoh, M. Sohma, K. Kawaguchi, and Y. Oosawa
[J. Solid State Chem., Vol.110, pp. 150-155, 1994]
Black single crystals of Li_{0.5}TiO_{2} were synthesized by the reaction of lithium metal and titanium dioxide at 1473 K. It crystallizes in the orthorhombic ramsdellite-type structure, space group Pbnm with a=5.0356(6), b=9.6377(8), c=2.9484(7) Å, V=143.09(4) Å^{3}, and Z=4. The structure was determined from a single-crystal X-ray study and refined to the conventional values R=0.038 and wR=0.046 for 744 independent reflections. The distorted octahedral sites are occupied only by Ti atoms, and a Li atom is located at one tetrahedral tunnel site with the occupancy factor of 0.45(2) (Fig.1).
