Integral‐breadth analysis of X‐ray line broadening in cold‐worked natural molybdenite (MoS2) crystals

An anomalous X-ray line broadening effect has been studied in cold-worked natural molybdenite (MoS2)crystals using the integral-breadth method. The stacking-fault probability is calculated on the basis of simple h.c.p. structure and is found to be approximately 0.03 on taking account the glide on S–S (sulphur–sulphur) slip planes only. Also, lattice strain and domain-size parameter have been estimated. The dislocation density calculated from the domain-size is found to be ≈2.6 × 1010 cm/cm3. A justification for using the simple h.c.p. structure theory for molybdenite has also been given. Ein anomaler Rontgenlinienverbreiterungseffekt wurde an kaltbearbeiteten, naturlichen Molybdanit (MoS2)-Kristallen mittels einer Integral-“breadth”-Methode untersucht. Die Stapelfehlerwahrscheinlichkeit wird auf der Grundlage einer simplen h.d.p.-Struktur berechnet und gefunden, das sie naherungsweise 0,03 betragt, wobei allein Gleitung auf S–S (Schwefel–Schwefel)-Gleitebenen berucksichtigt wird. Gitterdehnung und Domanen-groseparameter wurden ebenfalls berechnet. Die Versetzungsdichte wurde aus der Domanengrose zu ≈2,6 × 1010 cm/cm3 bestimmt. Eine Rechtfertigung fur die Benutzung der einfachen h.d.p.-Strukturtheorie fur Molybdanit wird ebenfalls angegeben.

[1]  E. M. Hörl.  Dislocations in Molybdenite , 1965 .

[2]  R. Uyeda,et al.  Dislocation Networks and Moiré Patterns of Molybdenite , 1960 .

[3]  B. Warren.  X-ray studies of deformed metals , 1959 .

[4]  B. Averbach,et al.  Imperfections in hexagonal cobalt , 1958 .

[5]  J. Christian,et al.  The measurement of growth and deformation faulting in hexagonal cobalt , 1956 .

[6]  G. K. Williamson,et al.  III. Dislocation densities in some annealed and cold-worked metals from measurements on the X-ray debye-scherrer spectrum , 1956 .

[7]  A. Kelly,et al.  X-ray studies of polycrystalline metals deformed by rolling. III. The physical interpretation of the experimental results , 1954 .

[8]  A. Kelly,et al.  The estimation of dislocation densities in metals from X-ray data , 1953 .

[9]  J. Christian,et al.  The measurement of X-ray line breadths , 1953 .

[10]  M. S. Paterson.  X‐Ray Diffraction by Face‐Centered Cubic Crystals with Deformation Faults , 1952 .

[11]  B. Warren,et al.  The Separation of Cold‐Work Distortion and Particle Size Broadening in X‐Ray Patterns , 1952 .

[12]  B. Warren,et al.  The Effect of Cold‐Work Distortion on X‐Ray Patterns , 1950 .

[13]  B. Warren.  X-Ray Diffraction in Random Layer Lattices , 1941 .

[14]  C. K. Ingold.  The Nature of the Chemical Bond and the Structure of Molecules and Crystals , 1940, Nature.

[15]  S. Hendricks.  Variable Structures and Continuous Scattering of X-Rays from Layer Silicate Lattices , 1940 .