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
  • InChI=1S/ClHO4.Rb/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 checkY
    Key: NQYGGOOZLKJKPS-UHFFFAOYSA-M checkY
  • InChI=1/ClHO4.Rb/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1
    Key: NQYGGOOZLKJKPS-REWHXWOFAS
  • [Rb+].[O-]Cl(=O)(=O)=O
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
3×10−3[2]
Hazards
GHS labelling:
GHS03: OxidizingGHS07: Exclamation mark
Warning
H272, H302, H315, H319, H332, H335
P210, P220, P221, P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamond
2
0
0
OX
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

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

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:[3]

2 RbClO3 → RbClO4 + RbCl + O2

When heated, it decomposes into the chloride and oxygen:[4]

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. 1 2 3 F. Brezina, J. Mollin, R. Pastorek, Z. Sindelar. Chemicke tabulky anorganickych sloucenin (Chemical tables of inorganic compounds). SNTL, 1986.
  2. ↑ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–189. ISBN 1138561630.
  3. ↑ Abegg, R.; Auerbach, F. (1908). Handbuch der anorganischen Chemie. Vol. 2. S. Hirzel. p. 431.
  4. ↑ d' Ans, Jean; Lax, Ellen (1997). Taschenbuch für Chemiker und Physiker. 3. Elemente, anorganische Verbindungen und Materialien, Minerale. Vol. 3 (4th ed.). Berlin: Springer. p. 686. ISBN 3-540-60035-3. OCLC 312750698.
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