Phosphide carbides or carbide phosphides are compounds containing anions composed of carbide (C4−) and phosphide (P3−). They can be considered as mixed anion compounds. Related compounds include the phosphide silicides, germanide phosphides, arsenide carbides, nitride carbides and silicide carbides.

In light rare earth phosphide carbides, the ethenide ion [C=C]4− exists. In these P and C2 are disordered, and they randomly substitute for each other, even though charge differs. Bonds between carbon and phosphorus are weak, and so these kind of compounds do not contain a C-P bond, instead carbon or phosphorus stand by themselves.[1]

Phosphide carbides can be made by heating a metal, red phosphorus and graphite powder together in a carbon crucible under an inert gas atmosphere.[1]

## List[edit]

formula  | system  | space group  | unit cell Å  | volume  | density  | comment  | ref

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V2PC  | hexagonal  | P63/mmc | a=3.077 c=10.91  |  |  |  | [2]
V3PC1-x |  |  |  |  |  |  | [3]
V4P2C  |  | P62m | a =9.567,c =3.166  |  |  |  | [3]
V18P9C2 | orthorhombic  | Pmma | a = 17.044, b = 3.2219, c = 13.030, Z = 2  | 715.5  | 5.66  |  | [4]
Cr3PC  | orthorhombic  | Cmcm | a=3.051 b=9.702 c=7.295 Z=4  | 216  | 6.16  | metallic  | [5]
Cr8.105P6C0.76Cr8P6C  |  | P31m | a=6.682 c=4.606  |  |  |  | [6]
Nb2PC  | hexagonal  | P63/mmc | a=3.38 c=11.5  |  |  | black  | [7]
Nb3P2C  | hexagonal  | P63/mmc | a=3.3063 c=18.0808 Z=2  | 171.149  | 6.8  |  | [8]
YRu2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
La4[P0.64(C2)0.36]3 | cubic  | I213  | a=8.9300 Z=4  | 712.1  |  |  | [1]
Ce4[P0.66(C2)0.34]3 | cubic  | I213  | a=8.7592 Z=4  | 680.4  |  |  | [1]
Pr4[P0.65(C2)0.35]3 | cubic  | I213  | a=8.809 Z=4  | 683.6  |  |  | [1]
Nd4[P0.68(C2)0.32]3 | cubic  | I213  | a=8.6763 Z=4  | 653.1  |  |  | [1]
CeRu2PC  |  | Cmcm | a=3.8896 b=10.9730 c=7.1472 Z=4  | 305.0  | 5.05  | grey; air stable  | [9]
SmRu2PC  |  | Cmcm | 3.8278 b=10.9465 c=7.0986 Z=4  | 297.4  | 5.32  | grey; air stable  | [9]
GdRu2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
TbRu2PC  |  | Cmcm | a=3.7764 b=10.9661 c=7.0504 Z=4  | 292.0  | 5.53  | grey; air stable  | [9]
DyRu2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
HoRu2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
ErRu2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
Ta3P2C  | hexagonal  | P63/mmc | a=3.2969 c=18.010 Z=2  | 169.531  | 12.1  |  | [8]
YOs2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
CeOs2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
PrOs2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
NdOs2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
SmOs2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]
GdOs2PC  |  | Cmcm | a=3.8274 b=10.8875 c=7.2140 Z=4  | 300.6  | 7.73  | grey; air stable  | [9]
TbOs2PC  |  | Cmcm | Z=4  |  |  | grey; air stable  | [9]

## References[edit]

1. ^ a b c d e f Chizhov, Pavel S.; Schnelle, Walter; Burkhardt, Ulrich; Schmidt, Marcus; Prots, Yurii; Antipov, Evgeny V.; Grin, Yuri (2010-05-25). "RE4[P1-x(C2)x]3 (RE = La-Nd): the Mixed Anionic Substructure Formed by Phosphorus and Carbon". Zeitschrift für anorganische und allgemeine Chemie. 636 (7): 1318–1325. doi:10.1002/zaac.201000023.
2. ^ Boller, H.; Nowotny, H. (March 1968). "Die Kristallstruktur von V2PC und V5P3N: Kurze Mitteilung". Monatshefte für Chemie - Chemical Monthly (in German). 99 (2): 672–675. doi:10.1007/BF00901220. ISSN 0026-9247. S2CID 92175690.
3. ^ a b Boller, H. (1973). "Röntgenographische Untersuchungen im Dreistoff V-P-C". Monatshefte für Chemie. 104 (1): 48–56. doi:10.1007/BF00911144. S2CID 91814211.
4. ^ Boller, Herbert; Effenberger, Herta (2016-05-01). "V18P9C2: a complex phosphide carbide". Zeitschrift für Naturforschung B. 71 (5): 521–526. doi:10.1515/znb-2016-0012. ISSN 1865-7117. S2CID 197093843.
5. ^ Zu, L.; Lin, S.; Tong, P.; Lin, J.C.; Kan, X.C.; Wang, B.S.; Song, W.H.; Sun, Y.P. (May 2015). "Synthesis and physical properties of Cr–P-based intermetallic compounds: Cr3P, Cr3PC, and Cr3PN". Journal of Alloys and Compounds. 630: 310–315. doi:10.1016/j.jallcom.2015.01.051.
6. ^ Broll, Sascha; Jeitschko, Wolfgang (November 1995). "The chromium phosphide carbide Cr8P6C". Journal of Alloys and Compounds. 229 (2): 233–237. doi:10.1016/0925-8388(95)01671-6.
7. ^ Beckmann, O.; Boller, H.; Nowotny, H. (1968). "Neue H-Phasen: Kurze Mitteilung". Monatshefte für Chemie (in German). 99 (4): 1580–1583. doi:10.1007/BF00902709. ISSN 0026-9247. S2CID 92211822.
8. ^ a b Chen, Hongxiang; Yang, Dongliang; Zhang, Qinghua; Jin, Shifeng; Guo, Liwei; Deng, Jun; Li, Xiaodong; Chen, Xiaolong (2019-03-26). "A Series of MAX Phases with MA‐Triangular‐Prism Bilayers and Elastic Properties". Angewandte Chemie. 131 (14): 4624–4628. doi:10.1002/ange.201814128. ISSN 0044-8249. S2CID 104420787.
9. ^ a b c d e f g h i j k l m n o Pohlkamp, Marc W.; Witte, Anne M.; Jeitschko, Wolfgang (July 2009). "Quaternary Rare Earth Ruthenium and Osmium Phosphide Carbides R Ru 2 PC and R Os 2 PC with DyFe 2 SiC Type Structure". Zeitschrift für anorganische und allgemeine Chemie. 635 (9–10): 1430–1434. doi:10.1002/zaac.200900006.

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Salts and covalent derivatives of the carbide ion

| CH4
+H |  |  |  | He

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Li2C2 | Be2C | B4C
BnCm
+B | C

C4− | CN−
(CN)2
+N | CO
CO2
C3O2 | CF
CF4 | Ne
Na2C2 | Mg2C | Al4C3 | SiC
+Si | +P | CS2
+S | CCl4
+Cl | Ar
K2C2 | CaC
CaC2 |  | ScC Sc3C4 Sc4C3 Sc15C19 | TiC | VC | Cr3C2 | MnC2 | Fe2C
Fe3C
Fe5C2 | CoC | Ni2C | CuC
CuC2 | Zn2C | Ga  | +Ge | +As | CSe2 | CBr4
+Br | Kr
Rb2C2 | SrC2 |  | YC | ZrC | NbC | MoC Mo2C | Tc  | Ru2C | Rh2C | PdC2 | Ag2C2 | CdC | InC | Sn  | Sb  | Te  | CI4
+I | Xe
Cs2C2 | BaC2 | *  | LuC2 | HfC | TaC5 | WC | Re2C | Os2C | Ir2C | PtC | Au2C2 | Hg2C2 | TlC | ?PbC | Bi  | Po  | At  | Rn
Fr  | Ra  | **  | Lr  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og

*  | LaC2 | CeC2 | PrC2 | NdC2 | PmC2 | SmC2 | EuC2 | GdC2 | TbC2 | DyC2 | HoC2 | ErC2 | TmC2 | YbC2
**  | Ac  | ThC | PaC | UC | NpC, Np2C3 | PuC, Pu2C3 | Am  | Cm  | Bk  | Cf  | Es  | Fm  | Md  | No

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Phosphides

Binary phosphides|

| PH3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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Li3P | Be  |  |  |  |  |  |  |  |  |  |  | BP | CP
+C | N  | +O | F  | Ne
Na3P | Mg  |  |  |  |  |  |  |  |  |  |  | AlP | +Si
-SiP | P | S  | +Cl | Ar
K3P | Ca3P2
CaP | ScP | TiP | V  | CrP
Cr3P | Mn  | Fe2P | CoP
Co2P
Co3P2 | NixPy | Cu3P | Zn3P2
ZnP2 | GaP | -GeP | As  | Se  | +Br | Kr
Rb  | Sr3P2 | YP | ZrP
ZrP2 | NbP | MoP
MoP2 | Tc  | Ru2P | Rh  | Pd  | Ag3P | Cd3P2 | InP | Sn  | SbP | +Te | +I | Xe
Cs3P | Ba  | *  | Hf  | Ta  | W  | Re  | OsP2 | Ir  | Pt  | Au  | Hg  | Tl  | PbP7 | BiP | Po  | At  | Rn
Fr  | Ra  | **  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | LaP | CeP | PrP | NdP | Pm  | SmP | EuP | GdP | TbP | DyP | HoP | ErP | TmP | YbP | LuP |
| ** | AcP | Th  | Pa  | UP | Np  | PuP | Am  | Cm  | Bk  | Cf  | Es  | Fm  | Md  | No  | Lr  |

Ternary phosphides|

* GaInP
* GaAsP
* AlGaP

Quaternary phosphides|

* Zn-Cd-P-As
* InAsSbP
* AlGaInP

Quinary phosphides|

* GaInAsSbP

See also|

* Ferrophosphorus
* Oxyphosphides
* Phosphide carbide
* Phosphide chloride
* Telluride phosphide

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