:Beryllium sulfide
{{short description|Chemical compound}}
{{Chembox
| Name = Beryllium sulfide
| ImageFile = Sphalerite polyhedra.png
| ImageSize = 250
| OtherNames =
| Section1 = {{Chembox Identifiers
| Abbreviations =
| CASNo = 13598-22-6
| EINECS = 237-064-6
| PubChem = 83605
| ChemSpiderID = 44415277
| SMILES = [Be+2].[S-2]
| InChI = 1S/Be.S
| InChIKey = FQDSYGKTHDFFCM-UHFFFAOYSA-N
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| Section2 = {{Chembox Properties
| Formula =
| Be=1 | S=1
| MolarMass = 41.077 g/mol
| Appearance = white crystalline
| Density = 2.36 g/cm3
| MeltingPtC = 1800
| MeltingPt_notes = decomposes
| BoilingPtC =
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| Solubility = Decomposes
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| pKa =
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| BandGap = 7.4 eV
| RefractIndex = 1.741
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| Section3 = {{Chembox Structure
| CrystalStruct = cubic
| Coordination =
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| SpaceGroup = F{{overline|4}}3m{{cite journal |author1=Eugene Staritzky |title=Crystallographic Data. 121. Beryllium Sulfide, BeS |journal=Analytical Chemistry |date=1956 |volume=28 |issue=5 |page=915 |doi=10.1021/ac60113a045 |language=en}}
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| Section4 = {{Chembox Thermochemistry
| DeltaHf = −235 kJ/mol
| DeltaHc =
| DeltaGf =
| Entropy = 34 J/mol K
| HeatCapacity = 34 J/mol K
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| Section7 = {{Chembox Hazards
| ExternalSDS =
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| LD50 =
| 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)
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| Section8 = {{Chembox Related
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Beryllium sulfide (BeS) is an ionic compound from the sulfide group with the formula BeS. It is a white solid with a sphalerite structure that is decomposed by water and acids.{{cite book | url=https://books.google.com/books?id=3-GbhmSfyeYC&pg=PA127 | page=127 | title=Beryllium Chemistry and Processing | publisher=ASM International | author=Kenneth A. Walsh | year=2009 | isbn=978-087170721-5}}
Preparation
Beryllium sulfide powders can be prepared by the reaction of sulfur and beryllium in a hydrogen atmosphere by heating the mixture for 10-20 minutes at temperatures from 1000-1300 °C. If done at 900 °C, there is beryllium metal impurities.{{cite journal |author1=William Zachariasen |title=Die Kristallstrunkturen von Berylliumoxyd und Berylliumsulfid |trans-title=The crystal structures of beryllium oxide and beryllium sulfide |journal=Zeitschrift für Physikalische Chemie |date=1926 |volume=119U |issue=1 |pages=201–213 |doi=10.1515/zpch-1926-11921 |s2cid=99383696 |language=de}}
Alternatively, it can be prepared by the reaction of beryllium chloride and hydrogen sulfide at 900 °C.
References
{{Reflist}}
{{Beryllium compounds}}
{{Sulfides}}
Category:Zincblende crystal structure
{{Inorganic-compound-stub}}