:Beryllium sulfate
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 486406740
| ImageFile = Beryllium sulfate.svg
| Name = Beryllium sulfate
| ImageFile1 = Beryllium sulfate 4 hydrate.jpg
| OtherNames =
| Section1 = {{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 24291
| InChI = 1/Be.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
| SMILES = [Be+2].[O-]S([O-])(=O)=O
| SMILES_Comment = anhydrous
| SMILES1 = [OH2+][Be-2]([OH2+])([OH2+])[OH2+].[O-]S([O-])(=O)=O
| SMILES1_Comment = tetrahydrate
| InChIKey = KQHXBDOEECKORE-NUQVWONBAA
| CASNo = 13510-49-1
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo1_Ref = {{cascite|correct|CAS}}
| CASNo1 = 7787-56-6
| CASNo1_Comment = (tetrahydrate)
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 01UQ1KPC7E
| UNII1_Ref = {{fdacite|correct|FDA}}
| UNII1 = 2TYK3LF8ZN
| UNII1_Comment = (tetrahydrate)
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 53473
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/Be.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = KQHXBDOEECKORE-UHFFFAOYSA-L
| PubChem = 26077
| EINECS = 236-842-2
| RTECS = DS4800000
}}
| Section2 = {{Chembox Properties
| Properties_ref = {{RubberBible62nd|page=B-82}}.
| Formula = BeSO4
| MolarMass = 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)
| Solubility = 36.2 g/100 mL (0 °C)
40.0 g/100 mL (20 °C)
54.3 g/100 mL (60 °C)
| SolubleOther = insoluble in alcohol
| MeltingPtC = 110
| MeltingPt_notes = (tetrahydrate, −2H2O)
400 °C (dihydrate, dehydr.)
550–600 decomposes
| BoilingPtC = 2500
| BoilingPt_notes = (anhydrate)
580 °C (tetrahydrate)
| RefractIndex = 1.4374 (tetrahydrate)
}}
| Section5 = {{Chembox Thermochemistry
| DeltaHf = −1197 kJ/mol
| DeltaGf = −1088 kJ/mol
| Entropy = 90 J/mol K
}}
| Section7 = {{Chembox Hazards
| ExternalSDS = [http://www.inchem.org/documents/icsc/icsc/eics1351.htm ICSC 1351]
| GHSPictograms = {{GHS06|Acute Tox. 2}} {{GHS08|Carc. 1B}} {{GHS09|Aquatic Chronic 2}}
| GHSSignalWord = DANGER
| HPhrases = {{H-phrases|350|330|301|372|319|335|315|317|411}}
| FlashPt = Non-flammable
| LD50 = 82 mg/kg (rat, oral)
80 mg/kg (mouse, oral){{IDLH|7440417|Beryllium compounds (as Be)}}
| REL = Ca C 0.0005 mg/m3 (as Be){{PGCH|0054}}
| PEL = TWA 0.002 mg/m3
C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)
}}
| Section8 = {{Chembox Related
| OtherAnions =
| OtherCations = Magnesium sulfate
Calcium sulfate
Strontium sulfate
Barium sulfate
}}
}}
Beryllium sulfate normally encountered as the tetrahydrate, [Be(H2O)4]SO4 is a white crystalline solid. It was first isolated in 1815 by Jons Jakob Berzelius.{{citation | first = Charles | last = Lathrop Parsons | year = 1909 | title = The Chemistry and Literature of Beryllium | url = https://books.google.com/books?id=iI8vpmK7jgoC | location = London | pages = 29–33| isbn = 9780559264160 }}. Beryllium sulfate may be prepared by treating an aqueous solution of many beryllium salts 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.{{citation | first = Pradyot | last = Patnaik | title = Handbook of Inorganic Chemicals | publisher = McGraw-Hill | year = 2002 | isbn = 0-07-049439-8}}.
Structure
According to X-ray crystallography 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.{{cite journal |doi=10.1107/S010876819400039X|title=The synergetic effect in beryllium sulfate tetrahydrate – an experimental electron-density study|year=1994|last1=Kellersohn|first1=T.|last2=Delaplane|first2=R. G.|last3=Olovsson|first3=I.|journal=Acta Crystallographica Section B: Structural Science|volume=50|issue=3|pages=316–326}} In contrast, the analogous magnesium salt, MgSO4·6H2O contains an octahedral Mg(OH2)62+ unit.Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications {{ISBN|0-19-855370-6}} The existence of the tetrahedral [Be(OH2)4]2+ ion in aqueous solutions of beryllium nitrate and beryllium chloride has been confirmed by vibrational spectroscopy, as indicated by the totally symmetric BeO4 mode attt 531 cm−1. This band is absent in beryllium sulfate, and the sulfate modes are perturbed. The data support the existence of Be(OH2)3OSO3.{{cite journal |doi=10.1039/B902481F|title=Hydration of Beryllium(II) in Aqueous Solutions of Common Inorganic Salts. A Combined Vibrational Spectroscopic and ab initio Molecular Orbital Study|year=2009|last1=Rudolph|first1=Wolfram W.|last2=Fischer|first2=Dieter|last3=Irmer|first3=Gert|last4=Pye|first4=Cory C.|journal=Dalton Transactions|issue=33|pages=6513–6527|pmid=19672497}}
The anhydrous compound has a structure similar to that of boron phosphate. 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.{{cite journal|last1=Grund|first1=Alfred|title=Die Kristallstruktur von BeSO4|journal=Tschermaks Mineralogische und Petrographische Mitteilungen|volume=5|issue=3|year=1955|pages=227–230|issn=0041-3763|doi=10.1007/BF01191066|bibcode=1955MinPe...5..227G}}
A mixture of beryllium and radium sulfate was used as the neutron source in the discovery of nuclear fission.
References
{{Reflist}}
External links
- {{ICSC|1351}}
- [https://web.archive.org/web/20051015082353/http://www-cie.iarc.fr/htdocs/monographs/vol58/mono58-1.htm IARC Monograph "Beryllium and Beryllium Compounds"]
- [http://www.inchem.org/documents/hsg/hsg/hsg044.htm IPCS Health & Safety Guide 44]
- {{EHC|106|name=Beryllium}}
- [http://www.inchem.org/documents/cicads/cicads/cicad32.htm IPCS CICAD 32]
{{Beryllium compounds}}
{{Sulfates}}
{{Authority control}}