Cadmium arsenide

Cadmium arsenide

Cd3As2 crystals with (112) and (400) orientations[1]

STM image of the (112) surface[1]
Names
Other names
Tricadmium diarsenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.336 Edit this at Wikidata
EC Number
  • 234-484-1
  • InChI=1/2As.3Cd/q2*-3;3*+2
    Key: PYIKGNIRLAMTQG-UHFFFAOYAS
  • [Cd+2].[Cd+2].[Cd+2].[As-3].[As-3]
Properties
Cd3As2
Molar mass 487.08 g/mol
Appearance solid, dark grey
Density 3.031
Melting point 716 °C (1,321 °F; 989 K)
decomposes in water
Structure[2]
Tetragonal, tI208
I41/acd, No. 142-2
a = 1.26512(3) nm, c = 2.54435(4) nm
Hazards
GHS labelling:
GHS06: ToxicGHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H301, H312, H330, H350, H410
P201, P202, P260, P261, P264, P270, P271, P273, P280, P281, P284, P301+P310, P302+P352, P304+P340, P308+P313, P310, P311, P312, P320, P321, P322, P330, P363, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
4
1
0
W
Lethal dose or concentration (LD, LC):
no data
NIOSH (US health exposure limits):
PEL (Permissible)
 [1910.1027] TWA 0.005 mg/m3 (as Cd)[3]
REL (Recommended)
 Ca[3]
IDLH (Immediate danger)
 Ca [9 mg/m3 (as Cd)][3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Cadmium arsenide (Cd3As2) is an inorganic semimetal in the II-V family. It exhibits the Nernst effect.

  1. ^ a b Sankar, R.; Neupane, M.; Xu, S.-Y.; Butler, C. J.; Zeljkovic, I.; Panneer Muthuselvam, I.; Huang, F.-T.; Guo, S.-T.; Karna, Sunil K.; Chu, M.-W.; Lee, W. L.; Lin, M.-T.; Jayavel, R.; Madhavan, V.; Hasan, M. Z.; Chou, F. C. (2015). "Large single crystal growth, transport property, and spectroscopic characterizations of three-dimensional Dirac semimetal Cd3As2". Scientific Reports. 5: 12966. Bibcode:2015NatSR...512966S. doi:10.1038/srep12966. PMC 4642520. PMID 26272041.
  2. ^ Ali, M. N.; Gibson, Q.; Jeon, S.; Zhou, B. B.; Yazdani, A.; Cava, R. J. (2014). "The Crystal and Electronic Structures of Cd3As2, the Three-Dimensional Electronic Analogue of Graphene". Inorganic Chemistry. 53 (8): 4062–4067. arXiv:1312.7576. doi:10.1021/ic403163d. PMID 24679042.
  3. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0087". National Institute for Occupational Safety and Health (NIOSH).