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Calcium Arsenide

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Products Intro: CAS:12255-53-7
Calcium Arsenide Basic information
Product Name:Calcium Arsenide
Synonyms:tricalcium diarsenide;CALCIUM ARSENIDE
CAS:12255-53-7
MF:AsCaH2
MW:117.02
EINECS:235-509-9
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Mol File:12255-53-7.mol
Calcium Arsenide Structure
Calcium Arsenide Chemical Properties
EPA Substance Registry SystemCalcium arsenide (Ca3As2) (12255-53-7)
Safety Information
MSDS Information
Calcium Arsenide Usage And Synthesis
DescriptionCalcium arsenide has the molecular formula of Ca3As2 and the molecular weight of 270.0772 g/mol. It may be prepared by reacting the elements together.
Since As sublimes at 614°C and Ca melts at 839°C, the latter is melted at about 875°C in an inert atmosphere like argon (not N2 which would form nitrides) and arsenic vapors are carried into the reaction zone by a stream of Ar gas:
3Ca + 2As + heat ? Ca3As2
Its CAS number is 12255-53-7. The standard Gibbs energies of formation of Ca3As2 was determined by a chemical equilibration technique yielding the following results:
3Ca + 2As ? Ca3As2 (solid)
△G°= -723,800 + 172.8T (J/mol)
(T = 1273 to 1573 K)
Calcium arsenide has the zinc-blende (cubic) structure with a = 6.751 ? . It can also be prepared by the reduction of calcium arsenate by carbon:
2Ca3AsO4 + 5C + heat ? Ca3As2 + 2CaO + 3CO2
Calcium Arsenide Preparation Products And Raw materials
Tag:Calcium Arsenide(12255-53-7) Related Product Information
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