Semiconducting CsMo(4-x)O(12)(X~0.13): Room temperature crystal structure and resistivity anisotropy of a new alkali molybdenum bronze.

Cesium molybdenum bronze, CsMo(4-x)O(12), is a recently discovered highly anisotropic semiconductor that crystallizes in the monoclinic system with space group C2/m and four formulas in the unit cell. The Cs atoms in the crystal structure occupy two different sites; both, as well as the nine independent O atom sites, are fully occupied but the four independent Mo atom sites contain significant Schottky defects, with x = 0.132 in the chemical formula. All metal atoms undergo significant anharmonic motion.