Rubidium sulfide

Rubidium sulfide
Names
	IUPAC name Rubidium sulfide
Identifiers
CAS Number	31083-74-6 ;
3D model (JSmol)	Interactive image;
PubChem CID	13710577;
CompTox Dashboard (EPA)	DTXSID001336474 ;
	InChI InChI=1S/2Rb.S/q2*+1;-2 Key: AHKSSQDILPRNLA-UHFFFAOYSA-N;
	SMILES [S-2].[Rb+].[Rb+];
Properties
Chemical formula	Rb2S
Molar mass	203.00
Appearance	white crystal
Density	2.912 g/cm3
Melting point	530 °C
Solubility in water	hydrolyses to rubidium bisulfide
Solubility in ethanol and glycerol	soluble
Structure
Crystal structure	cubic:anti-fluorite
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H400
Precautionary statements	P260, P264, P273, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P391, P405, P501
Related compounds
Other anions	Rubidium oxide; Rubidium selenide; Rubidium telluride; Rubidium polonide
Other cations	Lithium sulfide; Sodium sulfide; Potassium sulfide; Caesium sulfide; Francium sulfide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Rubidium sulfide is an inorganic compound and a salt with the chemical formula Rb₂S. It is a white solid with similar properties to other alkali metal sulfides.

Production

By dissolving hydrogen sulfide into rubidium hydroxide solution, it will produce rubidium bisulfide, followed by rubidium sulfide.^[3]^[4]

\mathrm {RbOH+H_{2}S\longrightarrow RbHS+H_{2}O}

\mathrm {RbHS+RbOH\longrightarrow Rb_{2}S+H_{2}O}

Rubidium sulfide has a cubic crystal similar to lithium sulfide, sodium sulfide and potassium sulfide, known as the anti-fluorite structure. Their space groups are $Fm{\bar {3}}m$ . Rubidium sulfide has a crystal lattice unit cell dimension of = 765.0 pm.^[1]

Rubidium sulfide reacts with sulfur in hydrogen gas to form rubidium pentasulfide, Rb₂S₅.^[4]^[5]

^ ^a ^b ^c 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 ([1], p. 692, at Google Books).
^ Dale L. Perry, Sidney L. Phillips: Handbook of inorganic compounds. CRC Press, 1995, ISBN 978-0-8493-8671-8, S. 336 ([2], p. 336, at Google Books).
^ Wilhelm Blitz, Ernst Wilke-Dörfurt: "Über Sulfide des Rubidiums und Cäsiums" in Zeitschr. f. anorg. Chem. 1906. 48, S. 297–317. Volltext
^ ^a ^b R. Abegg, F. Auerbach: 'Handbuch der anorganischen Chemie'. Verlag S. Hirzel, Bd. 2, 1908. S. 430.Volltext
^ Wilhelm Blitz, Ernst Wilke-Dörfurt: Ueber die Pentasulfide des Rubidiums und Cäsiums. In Ber. d. dt. chem. Ges. 1905, 38, 1, S. 123–130, doi:10.1002/cber.19050380114.