Abstract: | The Quaternary System ZnIn2S4? ZnIn2Se4? In2Se3? In2S3 The title system has been investigated on the indium rich side (ratio In/Zn ≥ 2) on samples quenched from 800°C to room temperature using x-ray methods. In this section 7 different phases could be identified the phase borders of which are given. ZnIn2S4-type and thiogallate type mixed crystals only show a small region of homogeneity while the monophase region of spinel type mixed crystals in the indiumsulfide rich part of the phase diagram has a larger extension. There is a new trigonal compound ZnIn2S2Se2 (ahex = 3.937, chex = 31.97 Å) with a large region of homogeneity. In the indiumselenide rich part there are two new phases: (i) Zn0.4In2Se3.4 with unknown structure and (ii) a ternary phase of unknown structure in the system In2S3?xSex for 2.1 ≤ x ≤ 2.7. |