| Names | |
|---|---|
| Other names Tricadmium diphosphide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.031.437 |
| EC Number |
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| |
| |
| Properties | |
| Cd3P2 | |
| Molar mass | 399.178 g/mol |
| Appearance | bluish white[1] or gray[2] |
| Density | 5.96 g/cm3[1] |
| Melting point | 700[1] °C (1,292 °F; 973 K) |
| Electron mobility | 1500 cm2/Vs[1] |
Refractive index (nD) | 3.88[1] |
| Structure | |
| Tetragonal | |
| Hazards | |
| GHS labelling: | |
   | |
| Warning | |
| H302,H312,H314,H332,H350,H370,H410 | |
| P201,P202,P210,P233,P261,P264,P270,P271,P273,P280,P301+P312,P302+P352,P304+P340,P308+P313,P312,P330,P362+P364,P391,P405,P501 | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Cadmium phosphide (Cd3P2) is aninorganicchemical compound. It is a grey or white bluish solidsemiconductor material with a bandgap of 0.5 eV.[1] It has applications as a pesticide, material for laser diodes and for high-power-high-frequency electronics.[1]
Cadmium phosphide can be prepared by the reaction ofcadmium withphosphorus:
Cd3P2 has a room-temperaturetetragonal form.
The crystalline structure of cadmium phosphide is very similar to that ofzinc phosphide (Zn3P2),cadmium arsenide (Cd3As2) andzinc arsenide (Zn3As2). These compounds of theZn-Cd-P-As quaternary system exhibit full continuous solid-solution.[3]
Over the last decade, interest in cadmium phosphide as a source for fast, near-IR emission has grown due to the development of cadmium phosphide quantum dots. Literature has demonstrated that these quantum dots possess tunable emission between 700 nm to 1500 nm.[4][5] A recent paper investigated the effect of surface passivation on these quantum dots and showed that cadmium phosphide quantum dots may have an intrinsic band-edge relaxation time less than 100 ns.[6]
Like other metal phosphides, it is acutely toxic when swallowed due to the formation ofphosphine gas when it reacts withgastric acid. It is also carcinogen and dangerous for the skin, eyes and other organs in a large part due tocadmium poisoning.