Beryllium sulfate

Beryllium sulfate
Identifiers
13510-49-1 [???]
7787-56-6 (tetrahydrate) 
ChEBI CHEBI:53473 Yes
ChemSpider 24291 Yes
EC number 236-842-2
Jmol-3D images Image
PubChem 26077
RTECS number DS4800000
Properties[1]
BeSO4
Molar mass 105.075 g/mol (anhydrous)
177.136 g/mol (tetrahydrate)
Appearance white solid
Odor odorless
Density 2.44 g/cm3 (anhydrous)
1.71 g/cm3 (tetrahydrate)
Melting point 110 °C (230 °F; 383 K) (tetrahydrate, −2H2O)
400 °C (dihydrate, dehydr.)
550–600 decomposes
Boiling point 2,500 °C (4,530 °F; 2,770 K) (anhydrate)
580 °C (tetrahydrate)
36.2 g/100 mL (0 °C)
40.0 g/100 mL (20 °C)
54.3 g/100 mL (60 °C)
Solubility insoluble in alcohol
1.4374 (tetrahydrate)
Thermochemistry
90 J/mol K
Std enthalpy of
formation (ΔfHo298)
 -1197 kJ/mol
-1088 kJ/mol
Hazards
MSDS ICSC 1351
GHS pictograms
GHS signal word DANGER
H350, H330, H301, H372, H319, H335, H315, H317, H411
EU Index 004-002-00-2
EU classification Carc. Cat. 2
Very toxic (T+)
Dangerous for the environment (N)
R-phrases R49, R25, R26, R36/37/38, R43, R48/23, R51/53
S-phrases S53, S45
Flash point Non-flammable
82 mg/kg (rat, oral)
Related compounds
Other cations
 Magnesium sulfate
Calcium sulfate
Strontium sulfate
Barium sulfate
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Beryllium sulfate normally encountered as the tetrahydrate, BeSO4·4H2O is a white crystalline solid. It was first isolated in 1815 by Jons Jakob Berzelius.[2]

Beryllium sulfate may be prepared by treating an aqueous solution of any beryllium salt with sulfuric acid, followed by evaporation of the solution and crystallization. The hydrated product may be converted to anhydrous salt by heating at 400 °C.[3] The tetrahydrate contains a tetrahedral Be(OH2)42+ unit and sulfate anions. The small size of the Be2+ cation determines the number of water molecules that can be coordinated. This contrasts with the analogous magnesium salt, MgSO4·6H2O which contains an octahedral Mg(OH2)62+ unit.[4]

The anhydrous compound has a structure similar to that of berlinite. The structure contains alternating tetrahedrally coordinated Be and S and each oxygen is 2 coordinate (Be-O-S). The Be-O distance is 156 pm and the S-O distance is 150 pm.[5]

A mixture of beryllium and radium sulfate was used as the neutron source in the discovery of nuclear fission.

References

  1. ↑ Weast, Robert C., ed. (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. B-82. ISBN 0-8493-0462-8..
  2. ↑ Lathrop Parsons, Charles (1909), The Chemistry and Literature of Beryllium, London, pp. 29–33.
  3. ↑ Patnaik, Pradyot (2002), Handbook of Inorganic Chemicals, McGraw-Hill, ISBN 0-07-049439-8.
  4. ↑ Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6
  5. ↑ Grund, Alfred (1955). "Die Kristallstruktur von BeSO4". Tschermaks Mineralogische und Petrographische Mitteilungen 5 (3): 227–230. doi:10.1007/BF01191066. ISSN 0041-3763.

External links