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

formula system space group unit cell Å volume density comment ref
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

  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.Open access icon
  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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