Oxid rubidný

Oxid rubidný
Obecné
Systematický názevOxid rubidný
Anglický názevRubidium oxide
Německý názevRubidiumoxid
Sumární vzorecRb2O
Vzhlednažloutlý až nahnědlý prášek
Identifikace
Registrační číslo CAS18088-11-4
Vlastnosti
Molární hmotnost186,94 g/mol
Teplota tání> 500 °C
Hustota4 g/cm³
Rozpustnost ve voděreaguje (na RbOH)
Struktura
Krystalová strukturakrychlová
Není-li uvedeno jinak, jsou použity
jednotky SI a STP (25 °C, 100 kPa).
Některá data mohou pocházet z datové položky.

Oxid rubidný je chemická sloučenina s vzorcem Rb2O. Oxid rubidný reaguje velmi prudce s vodou, proto se v přírodě nevyskytuje. Obsah rubidia v minerálech se často vyjadřuje v ekvivalentech Rb2O.

Oxid rubidný je žlutá pevná látka. Stejně jako většina oxidů alkalických kovů má antifluoritovou strukturu. Je to anhydrid hydroxidu rubidného.

Vlastnosti

Rb2O „má rád“ ostatní alkalické oxidy kovů, je silně zásaditý. Exotermně reaguje s vodou za vzniku hydroxidu rubidného:

Rb2O + H2O → 2 RbOH

Takže Rb2O je hygroskopický a ochotně reaguje s vodou. Při žíhání Rb2O reaguje s vodíkem za vzniku hydroxidu rubidného a hydridu rubidného :

Rb2O + H2 → RbOH + RbH

Reference

V tomto článku byl použit překlad textu z článku Rubidium oxide na anglické Wikipedii.

Externí odkazy

Oxidy s prvkem v oxidačním čísle I.
Anorganické soli rubidné
Halogenidy a pseudohalogenidy
Soli kyslíkatých kyselin

(neuvedeny soli
se záměnou kyslíku za jiný prvek,

složené a "zásadité")
Chlorečnan rubidný (RbClO3) • Chloristan rubidný (RbClO4) • Bromičnan rubidný (RbBrO3) • Bromistan rubidný (RbBrO4) • Jodičnan rubidný (RbIO3) • Jodistan rubidný (RbIO4) • Hydrogensíran rubidný (RbHSO4) • Síran rubidný (Rb2SO4) • Seleničitan rubidný (Rb2SeO3) • Selenan rubidný (Rb2SeO4) • Telluričitan rubidný (Rb2TeO3) • Telluran rubidný (Rb2TeO4) • Dusitan rubidný (RbNO2) • Dusičnan rubidný (RbNO3) • Dihydrogenorthofosforečnan rubidný (RbH2PO4) • Dihydrogenarseničnan rubidný (RbH2AsO4) • Metaniobičnan rubidný (RbNbO3) • Ditantaličnan dirubidný (Rb2Ta2O6) • Uhličitan rubidný (Rb2CO3) • Hydrogenuhličitan rubidný (RbHCO3) • Hydrogenšťavelan rubidný ([RbH(CO2)2)]n • Šťavelan rubidný (Rb2(CO2)2) • Manganistan rubidný (RbMnO4) • Chroman rubidný (Rb2CrO4) • Dichroman rubidný (Rb2Cr2O7) • Molybdenan rubidný (Rb2MoO4) • Wolframan rubidný (Rb2WO4) • Orthovanadičnan rubidný (Rb6V2O8) • Titaničitan rubidný (Rb2TiO3)
Soli tvořené záměnou vodíku
ze sloučenin typu prvekx - vodíky

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