The crystal structure of P4S3

Abstract

The crystal structure of PaSs has been determined by X-ray diffraction. Space group Pmnb, 8 molecules per unit cell. Two independent structure determinations are described; one by the application of inequalities and two-dimensional least-squares refinement and another by means of a three-dimensional Patterson synthesis and refinement by successive two-dimensional :Fourier syntheses. The final coordinates were obtained by three-dimensional least-squares refinement. The crystal consists of PaS S moleculcs having the same structure as that derived by Hassel & Pettersen in an electron-diffraction study of gaseous P4S S. The average P-S and P-P distances aro 2-090 and 2.235 A respectively.