Rubidium perchlorate

Rubidium perchlorate, RbClO4, is the perchlorate of rubidium. It is an oxidizing agent, as are all perchlorates.

Rubidium perchlorate[1]
Names
IUPAC name
Rubidium perchlorate
Other names
Perchloric acid rubidium salt,
Rubidium chlorate(VII), Rubidii perchloras (lat.)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.476
EC Number
  • 236-840-1
Properties
RbClO4
Molar mass 184.918 g/mol
Appearance Colorless crystals
Density 2.878 g/cm3
2.71 g/cm3 over 279 °C
Melting point 281 °C (538 °F; 554 K)
Boiling point 600 °C (1,112 °F; 873 K) (decomposes)
see chart
Hazards
R-phrases (outdated) R8, R36/38
S-phrases (outdated) (S2), S46
NFPA 704 (fire diamond)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Preparation and properties

Rubidium perchlorate can be obtained through the careful heating of a rubidium chlorate solution, leading to a disproportionation reaction with the release of oxygen gas:[2]

2 RbClO3 → RbClO4 + RbCl + O2

When heated, it decomposes into the chloride and oxygen:[3]

RbClO4 → RbCl + 2 O2

It has two polymorphs. Below 279 °C, it crystallizes in orthorhombic crystal system with lattice constants a = 0.927 nm, b = 0.581 nm, c = 0.753 nm. Over 279 °C, it has a cubic structure with lattice constant a = 0.770 nm.[1]

Table of solubility in water:[1]

Temperature (°C) 0 8.5 14 20 25 50 70 99
Solubility (g / 100 ml) 1.09 0.59 0.767 0.999 1.30 3.442 6.72 17.39

References
  1. F. Brezina, J. Mollin, R. Pastorek, Z. Sindelar. Chemicke tabulky anorganickych sloucenin (Chemical tables of inorganic compounds). SNTL, 1986.
  2. Abegg, R.; Auerbach, F. (1908). Handbuch der anorganischen Chemie. 2. S. Hirzel. p. 431.
  3. d' Ans, Jean; Lax, Ellen (1997). Taschenbuch für Chemiker und Physiker. 3. Elemente, anorganische Verbindungen und Materialien, Minerale. 3 (4th ed.). Berlin: Springer. p. 686. ISBN 3-540-60035-3. OCLC 312750698.
Compounds containing perchlorate group
HClO4 He
LiClO4 Be(ClO4)2 B(ClO
4)−
4
B(ClO4)3		 ROClO3 N(ClO4)3
NH4ClO4
NOClO4		 O FClO4 Ne
NaClO4 Mg(ClO4)2 Al(ClO4)3 Si P S ClO−
4
ClOClO3
Cl2O7		 Ar
KClO4 Ca(ClO4)2 Sc(ClO4)3 Ti(ClO4)4 VO(ClO4)3
VO2(ClO4)		 Cr(ClO4)3 Mn(ClO4)2 Fe(ClO4)3 Co(ClO4)2,
Co(ClO4)3		 Ni(ClO4)2 Cu(ClO4)2 Zn(ClO4)2 Ga(ClO4)3 Ge As Se Br Kr
RbClO4 Sr(ClO4)2 Y(ClO4)3 Zr(ClO4)4 Nb(ClO4)5 Mo Tc Ru Rh(ClO4)3 Pd(ClO4)2 AgClO4 Cd(ClO4)2 In(ClO4)3 Sn(ClO4)4 Sb TeO(ClO4)2 I Xe
CsClO4 Ba(ClO4)2   Hf(ClO4)4 Ta(ClO4)5 W Re Os Ir Pt Au Hg2(ClO4)2,
Hg(ClO4)2		 Tl(ClO4),
Tl(ClO4)3		 Pb(ClO4)2 Bi(ClO4)3 Po At Rn
FrClO4 Ra   Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
↓
La Ce(ClO4)x Pr Nd Pm Sm(ClO4)3 Eu(ClO4)3 Gd(ClO4)3 Tb(ClO4)3 Dy(ClO4)3 Ho(ClO4)3 Er(ClO4)3 Tm(ClO4)3 Yb(ClO4)3 Lu(ClO4)3
Ac Th(ClO4)4 Pa UO2(ClO4)2 Np Pu Am Cm Bk Cf Es Fm Md No Lr
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