Cobalt arsenide

Cobalt arsenide  Names

Other names

arsanylidynecobalt, cobalt monoarsenide

Identifiers

CAS Number

* 27016-73-5 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 105360

ECHA InfoCard | 100.043.775
EC Number |

* 248-168-6

PubChem CID

* 117908

CompTox Dashboard (EPA)

* DTXSID401014640

InChI

* InChI=1S/As.Co

Key: NMLUQMQPJQWTFK-UHFFFAOYSA-N

SMILES

* [As]#[Co]

Properties

Chemical formula

| CoAs
Molar mass | 133.85
Appearance  | solid
Density | 6.73 g/cm3
Melting point | 916 °C (1,681 °F; 1,189 K)
Hazards
GHS labelling:[1]

Pictograms

Signal word

| Danger

Hazard statements

| H301, H331, H410

Precautionary statements

| P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P321, P330, P391, P403+P233, P405, P501

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Chemical compound

Cobalt arsenide is a binary inorganic compound of cobalt and arsenic with the chemical formula CoAs.[2][3] The compound occurs naturally as the mineral modderite.[4][5]

## Physical properties[edit]

Cobalt arsenide crystallizes in the orthorhombic system, space group Pnam, parameter parameters a = 0.515 nm, b = 0.596 nm, c = 0.351 nm, Z = 4.

Cobalt arsenide is isostructural with FeAs.[6]

At approximately 6-8 GPa, single crystals of CoAs undergo a transformation to a lower-symmetry phase.[5]

## Use[edit]

CoAs is used as a semiconductor and in photo optic applications.[7]

## References[edit]

1. ^ "Cobalt arsenide". pubchem.ncbi.nlm.nih.gov. Retrieved 23 January 2022.
2. ^ Lide, David R. (29 June 2004). CRC Handbook of Chemistry and Physics, 85th Edition. CRC Press. pp. 4–53. ISBN 978-0-8493-0485-9. Retrieved 20 January 2022.
3. ^ Toxic Substances Control Act (TSCA) Chemical Substance Inventory. U.S. Government Printing Office. 1979. p. 16. Retrieved 20 January 2022.
4. ^ "Modderite Mineral Data". webmineral.com. Retrieved 20 January 2022.
5. ^ a b Gramsch, Stephen (December 2004). "Crystal Chemistry of Transition Metal Arsenides and the High Pressure Behavior of CoAs". Retrieved 20 January 2022.
6. ^ Heyding, R. D.; Calvert, L. D. (1 May 1957). "Arsenides of Transition Metals: The Arsenides of Iron and Cobalt". Canadian Journal of Chemistry. 35 (5): 449–457. doi:10.1139/v57-065. Retrieved 20 January 2022.
7. ^ "Cobalt(III) Arsenide". American Elements. Retrieved 20 January 2022.

* v
* t
* e

Cobalt compounds

Cobalt(I)|

* HCo(CO)4

Cobalt(II)|

* CoBr2
* Co(CN)2
* CoCO3
* CoC2O4
* CoCl2
* Co(ClO3)2
* CoF2
* Co(HCO2)2
* CoI2
* Co(NO3)2
* Co3(PO4)2
* Co(OAc)2
* CoGeO3
* CoO
* Co(OH)2
* CoS
* Co(OCN)2
* Co(SCN)2
* CoSO4
* CoSe
* Co3P2
* CoH2
* Co(C3H6O3)2
* C
24H
48CoO

* C
36H
70CoO

Cobalt(0, III)|

* CoSi
* CoGe

Cobalt(II, III)|

* Co3O4

Cobalt(III)|

* CoAs
* CoCl3
* Co(NO3)3
* Co2O3
* CoF3
* Co(OH)3
* LiCoO2

Cobalt(III,IV)|

* NaxCoO2

Cobalt(IV)|

* CoF4
* Cs2CoF6
* CoC28H44

Cobalt(V)|

* Na3CoO4

* v
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Arsenic compounds

Arsenides|

* AlAs
* BAs
* BiAs
* Cd3As2
* CaAs
* CoAs
* GaAs
* InAs
* YAs
* LiAs
* MoAs2
* MnAs
* NpAs
* NpAs2
* PdAs2
* PrAs
* PuAs
* SmAs
* Na3As
* TaAs
* WAs2
* YAs
* Zn3As2

As(III)|

* AsBr3
* AsCl3
* AsCl5
* AsF3
* AsH3
* AsI3
* As2O3
* As2S3
* As2Se3
* As4S4
* AsP

As(III,V)|

* As2O4

As(V)|

* AsF5
* AsCl5
* As2O5
* As2S5

* v
* t
* e

Arsenides

Binary arsenides|

| AsH3
+H |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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LiAs | Be |  |  |  |  |  |  |  |  |  |  |  | BAs | C | +N | +O | F | Ne
Na3As | Mg |  |  |  |  |  |  |  |  |  |  |  | AlAs | -Si | P | S | +Cl | Ar
K | CaAs |  | Sc | Ti | V | Cr | MnAs | Fe | CoAs | Ni | Cu | Zn3As2 | GaAs | -Ge | As | Se | +Br | Kr
Rb | Sr |  | YAs | Zr | Nb | MoAs2 | Tc | Ru | Rh | PdAs2 | Ag | Cd3As2 | InAs | -Sn | Sb | +Te | +I | Xe
Cs | Ba | *  | Lu | Hf | TaAs | WAs2 | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | BiAs | Po | At | Rn
Fr | Ra | **  | Lr | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | * | La | Ce | PrAs | Nd | Pm | SmAs | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb |
|  | ** | Ac | Th | Pa | U | NpAs
NpAs2 | PuAs | Am | Cm | Bk | Cf | Es | Fm | Md | No |

Ternary arsenides|

* AlGaAs
* AlInAs
* AlAsSb
* GaAsP
* GaAsSb
* (Ga,Mn)As
* InAsSb

Quaternary arsenides|

* Zn-Cd-P-As
* InAsSbP

Quinary arsenides|

* GaInAsSbP

See also|

* Oxyarsenides

*[CID]: Compound ID
*[EPA]: U.S. Environmental Protection Agency
*[H301]: H301: Toxic if swallowed
*[H331]: H331: Toxic if inhaled
*[H410]: H410: Very toxic to aquatic life with long lasting effects
*[P261]: P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
*[P264]: P264: Wash ... thoroughly after handling.
*[P270]: P270: Do not eat, drink or smoke when using this product.
*[P271]: P271: Use only outdoors or in a well-ventilated area.
*[P273]: P273: Avoid release to the environment.
*[P301+P310]: P301+P310: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
*[P304+P340]: P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
*[P311]: P311: Call a POISON CENTER or doctor/physician.
*[P321]: P321: Specific treatment (see ... on this label).
*[P330]: P330: Rinse mouth.
*[P391]: P391: Collect spillage.
*[P403+P233]: P403+P233: Store in a well ventilated place. Keep container tightly closed.
*[P405]: P405: Store locked up.
*[P501]: P501: Dispose of contents/container to ...
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