View source for Caesium selenide

{{use dmy dates|date=June 2023}}
{{Chembox
|   ImageFile = [[File:CaF2 polyhedra.png|250px|Caesium selenide]]<br/><div style="text-align:center">Cs<sup>+</sup>: <span style="color:#99CC00; background-color:#99CC00;">__</span> Se<sup>2-</sup>: <span style="color:#C0C0C0; background-color:#C0C0C0;">__</span></div> 
|   ImageName = Caesium selenide
|   OtherNames = 
| Section1 = {{Chembox Identifiers
|   CASNo = 31052-46-7
|   CASNo_Ref = {{cascite|correct|CAS}}
| ChemSpiderID = 148025
| EC_number = 250-448-8 
| PubChem = 169244
| StdInChI=1S/2Cs.Se/q2*+1;-2
| StdInChIKey = KUBAIENASCDSDJ-UHFFFAOYSA-N
| SMILES = [Se-2].[Cs+].[Cs+] 
  }}
| Section2 = {{Chembox Properties
|   Formula = Cs<sub>2</sub>Se
|   MolarMass = 344.771 
|   Appearance = colourless, highly hygroscopic crystals<ref name='Lax'>Jean D'Ans, Ellen Lax: ''Taschenbuch für Chemiker und Physiker. 3. Elemente, anorganische Verbindungen und Materialien, Minerale, Band 3.'' 4. Auflage, Springer, 1997, ISBN 978-3-5406-0035-0, S. 692 ({{Google books|||page=692}}).</ref>
|   Density = 4.33 g·cm<sup>−3</sup><ref>Sommer, Helmut; Hoppe, Rudolf. The crystal structure of cesium sulfide and a remark about cesium selenide, cesium telluride, rubidium selenide, and rubidium telluride{{in lang|de}}. ''Zeitschrift fuer Anorganische und Allgemeine Chemie'', 1977. 429: 118–130. ISSN: 0044-2313</ref>
|   Solubility = hydroyses<ref name='Alfa'>{{Alfa|39515|name='Rubidiumselenid'|Datum=Dienstag, 29 June 2010}}</ref>
  }}
| Section7 = {{Chembox Hazards
| GHS_ref=<ref>{{cite web |title=C&L Inventory |url=https://echa.europa.eu/information-on-chemicals/cl-inventory-database/-/discli/details/153441 |website=echa.europa.eu}}</ref>
| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|301|331|373|410}}
| PPhrases = {{P-phrases|}}
 }}
| Section8 = {{Chembox Related
|   OtherCations = [[lithium selenide]]<br/>[[sodium selenide]]<br/>[[potassium selenide]]<br/>[[rubidium selenide]]
|   OtherAnions = [[Caesium oxide]]<br/>[[Caesium sulfide]]<br/>[[Caesium sulfide]]<br/>[[Caesium polonide]]
  }}
}}

'''Caesium selenide''' is an inorganic compound of [[caesium]] and [[selenium]]. It is a [[selenide]], with the chemical formula of Cs<sub>2</sub>Se. It can be prepared by reacting caesium and selenium. It has an inverse [[fluorite]] structure, with [[space group]] <math>Fm\bar{3}m</math>. There are 4 units per unit cell,<ref name="Lax"/> and the other selenides from the same group are similar.

== References ==
{{Reflist}}

{{Caesium compounds}}
{{Selenides}}

[[Category:Caesium compounds]]
[[Category:Selenides]]