3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||345.984 g/mol|
|Melting point||1,015 °C (1,859 °F; 1,288 K)|
|H301, H331, H350, H410|
|P201, P202, P222, P231+P232, P261, P264, P270, P271, P273, P280, P281, P301+P310+P330, P304+P340, P308+P313, P321, P370+P378, P391, P403+P233, P405, P422, P501|
|NFPA 704 (fire diamond)|
|Safety data sheet (SDS)|||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Zn3As2 has a room-temperature tetragonal form that converts to a different tetragonal phase at 190 °C and to a third phase at 651 °C. In the room-temperature form, the zinc atoms are tetrahedrally coordinated and the arsenic atoms are surrounded by six zinc atoms at the vertices of a distorted cube. The crystalline structure of zinc arsenide is very similar to that of cadmium arsenide (Cd3As2), zinc phosphide (Zn3P2) and cadmium phosphide (Cd3P2). These compounds of the Zn-Cd-P-As quaternary system exhibit full continuous solid-solution.
Its lowest direct and indirect bandgaps are within 30 meV or each other.