Dicobalt phosphide

Crystal structure
	__ Co __ P; Metal-to-metal bonds are not shown.
General
Surname	Dicobalt phosphide
other names	Cobalt phosphide (ambiguous)
Ratio formula	Co 2 P
Brief description	gray solid
External identifiers / databases
EC number	235-212-4
ECHA InfoCard	100,031,999
PubChem	166621
Wikidata	Q4409491
properties
Molar mass	148.84 g mol −1
Physical state	firmly
density	6.4 g cm −3
Melting point	1386 ° C
solubility	almost insoluble in water
safety instructions
H and P phrases	H: 341-302-317
	P: 261-280-302 + 352-321-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dicobalt phosphide is a chemical compound of cobalt from the group of phosphides . In addition to cobalt (II) phosphide exist with the equally gray Cobalttriphosphid CoP ₃ and Cobaltmonophosphid other Cobaltphosphide CoP.

Extraction and presentation

Dicobalt phosphide (like the other cobalt phosphides) can be obtained by reacting a stoichiometric mixture of cobalt with red phosphorus at 650-700 ° C.

{\ displaystyle \ mathrm {2 \ Co + P \ longrightarrow Co_ {2} P}}

properties

Dicobalt phosphide is a gray solid that is insoluble in water. It is soluble in nitric acid . It has an orthorhombic crystal structure with the space group Pnma (space group no. 62) and the lattice parameters a = 6.638 Å , b = 5.67 Å and c = 3.52 Å. The structure corresponds to an anti- PbCl ₂ structure. Template: room group / 62

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet Cobalt phosphide, 98% from AlfaAesar, accessed on August 17, 2013 ( PDF )(JavaScript required) .
↑ ^a ^b Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1634.
^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer, 1998, ISBN 3-642-58842-5 , pp. 388 f . ( limited preview in Google Book search).
↑ H. Nowotny: The crystal structure of Co ₂ P. In: Zeitschrift für inorganic und Allgemeine Chemie , 254, 1947, pp. 31-36, doi: 10.1002 / zaac.19472540102 .

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet Cobalt phosphide, 98% from AlfaAesar, accessed on August 17, 2013 ( PDF )(JavaScript required) .

[brauer-2] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1634.

[Jean_d’Ans,_Ellen_Lax,_Roger_Blachnik-3] Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer, 1998, ISBN 3-642-58842-5 , pp. 388 f . ( limited preview in Google Book search).

[4] H. Nowotny: The crystal structure of Co ₂ P. In: Zeitschrift für inorganic und Allgemeine Chemie , 254, 1947, pp. 31-36, doi: 10.1002 / zaac.19472540102 .