The crystal structure of K2AgI3 and isomorphous substances

Abstract

KeAgI 3 is orthorhombic with cell dimensions: a ----19.52, b ----9-98, c ----4"74 /~. The axial ratios are in agreement with the values derived by Penfield from crystallographic measurements, if his b axis is halved. There are four molecules in the cell and the space group is Pbnm. Weissenberg diagrams have been taken along the c axis with Me Ka radiation and the positions of the atoms have been fixed by 'trial and error' and by a Fourier projection along the c axis.