THE CRYSTAL-STRUCTURE AND CALCULATED POWDER-DIFFRACTION DATA FOR ZVYAGINTSEVITE, PD3PB

The crystal structure of zvyagintsevite, Pd3Pb, has been re-examined u sing a single-crystal fragment from the Konder ultramafic massif, Far- Eastern Russia. The whole sphere of MoK alpha data was collected to 2 theta = 100 degrees, and the averaged and absorption-corrected unique segment of data was refined to R = 2.3%. An awaruite-type structure is confirmed, space group Pm (3) over bar m, with an a of 4.035(1) Angst rom. On the basis of the single-crystal refinement, a fully indexed po wder pattern has been calculated.