Structure Data for some Arsenic- and Germanium-rich Compounds of Molybdenum

Abstract

THE following four compounds of molybdenum have been prepared and examined by X-ray diffraction techniques; MoAs₂, Mo₀.₄As₂, MoGe₂ and MoGe_1.7. Single crystal techniques have been used to determine the space-group symmetries. For all but MoGe_1.7 the structures have been refined by the least-squares method from single-crystal intensities recorded in a Weissenberg camera using molybdenum K α radiation. The unit cell dimensions were evaluated from measurements of powder patterns recorded in a Guinier–Hägg focusing camera using chromium K α radiation. Silicon (a₀ = 5.43054 Å) was incorporated in the powder specimens as an internal calibrant. Details of the crystal structures are given below.