抄録
An X-ray scattering experiment of hollandite K1.5(Al1.5Ti6.5)O16 has been carried out. The diffuse X-ray scattering was characterized by the commensurate wave vector q0=(0, 0, 3⁄4). The correlation length for the c-axis (channel axis) is much longer than that of the a-axis and increases with decreasing temperature.