Strontium carbide

Crystal structure
General
Surname	Strontium carbide
other names	Strontium acetylide
Ratio formula	SrC 2
Brief description	black solid
External identifiers / databases
EC number	235-130-9
ECHA InfoCard	100,031,925
Wikidata	Q2357048
properties
Molar mass	111.64 g mol −1
Physical state	firmly
density	3.2 g cm −3
Melting point	> 1700 ° C
solubility	reacts with water
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Strontium carbide is a chemical compound made up of strontium and carbon .

Manufacturing

Strontium carbide can be made by annealing strontium oxide with coal .

{\ displaystyle \ mathrm {SrO + 3 \ C \ longrightarrow SrC_ {2} + CO \ uparrow}}

properties

Crystal structure of strontium carbide
__ Sr ²⁺ __ C ^-

Strontium carbide belongs to the group of carbides to the acetylides, as it is formally derived from ethyne . Like calcium carbide , it reacts with water to form acetylene and strontium hydroxide .

{\ displaystyle \ mathrm {SrC_ {2} +2 \ H_ {2} O \ longrightarrow Sr (OH) _ {2} + C_ {2} H_ {2} \ uparrow}}

Several modifications are known, the tetragonal shape being stable below 427 ° C. It crystallizes in the space group I 4 / mmm (space group no. 139) . The Sr ²⁺ ion is coordinated by two carbon atoms of four adjacent C ₂²⁻ ions and by one carbon atom of two other anions. At 427 ° C the tetragonal shape changes into a cubic phase with the space group Fm 3 m (no. 225) , below room temperature a monoclinic phase with the space group C 2 / c (no. 15) forms . Template: room group / 139Template: room group / 225Template: room group / 15

Individual evidence

↑ ^a ^b ^c ^d Dale L. Perry, Sidney L. Phillips: Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 978-0-8493-8671-8 , p. 387 ( limited preview in Google book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ ^a ^b R. Abegg, F. Auerbach: "Handbuch der inorganic Chemie". Verlag S. Hirzel, Vol. 2, 1908. P. 222 ( full text ).
↑ ^a ^b V. Vohn, M. Knapp, U. Ruschewitz: Synthesis and Crystal Structure of SrC ₂ , in: Journal of Solid State Chemistry , Volume 151, Issue 1, April 2000, pp. 111-116; doi: 10.1006 / jssc.2000.8630 .

[Perry-1] Dale L. Perry, Sidney L. Phillips: Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 978-0-8493-8671-8 , p. 387 ( limited preview in Google book search).

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Abegg-3] R. Abegg, F. Auerbach: "Handbuch der inorganic Chemie". Verlag S. Hirzel, Vol. 2, 1908. P. 222 ( full text ).

[Vohn-4] V. Vohn, M. Knapp, U. Ruschewitz: Synthesis and Crystal Structure of SrC ₂ , in: Journal of Solid State Chemistry , Volume 151, Issue 1, April 2000, pp. 111-116; doi: 10.1006 / jssc.2000.8630 .