Chemistry:Beryllium oxalate

Beryllium oxalate

Identifiers
CAS Number	3173-18-0 Y
3D model (JSmol)	Interactive image
ChemSpider	4953986
PubChem CID	6451522
InChI InChI=1S/C2H2O4.Be/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2 Key: XQZGLPVUHKSNBQ-UHFFFAOYSA-L
SMILES [Be+2].C(=O)(C(=O)[O-])[O-]
Properties
Chemical formula	C2BeO4
Molar mass	97.03
Appearance	Transparent crystals
Boiling point	365.1 °C (689.2 °F; 638.2 K)
Solubility in water	Soluble
Hazards
Flash point	188.8 °C (371.8 °F; 461.9 K)
Related compounds
Related compounds	Calcium oxalate Sodium oxalate Magnesium oxalate Strontium oxalate Barium oxalate Iron(II) oxalate Iron(III) oxalate Lithium oxalate Praseodymium oxalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Beryllium oxalate is an inorganic compound, a salt of beryllium metal and oxalic acid with the chemical formula C₂BeO₄. It forms colorless crystals, dissolves in water, and also forms crystalline hydrates. The compound is used to prepare ultra-pure beryllium oxide by thermal decomposition.

Synthesis

The action of oxalic acid on beryllium hydroxide:

$\mathsf{B}\mathsf{e}\mathsf{(}\mathsf{O}\mathsf{H}{\mathsf{)}}_{\mathsf{2}}\mathsf{+}{\mathsf{H}}_{\mathsf{2}}{\mathsf{C}}_{\mathsf{2}}{\mathsf{O}}_{\mathsf{4}}\stackrel{}{\to }\mathsf{B}\mathsf{e}{\mathsf{C}}_{\mathsf{2}}{\mathsf{O}}_{\mathsf{4}}\mathsf{+}\mathsf{2}{\mathsf{H}}_{\mathsf{2}}\mathsf{O}$

Chemical properties

Crystalline hydrates lose water when heated:

$\mathsf{B}\mathsf{e}{\mathsf{C}}_{\mathsf{2}}{\mathsf{O}}_{\mathsf{4}}\mathsf{\cdot }\mathsf{3}{\mathsf{H}}_{\mathsf{2}}\mathsf{O}\underset{-2H_{2}O}{\overset{100^{o}C}{\to }}\mathsf{B}\mathsf{e}{\mathsf{C}}_{\mathsf{2}}{\mathsf{O}}_{\mathsf{4}}\mathsf{\cdot }{\mathsf{H}}_{\mathsf{2}}\mathsf{O}\underset{-H_{2}O}{\overset{220^{o}C}{\to }}\mathsf{B}\mathsf{e}{\mathsf{C}}_{\mathsf{2}}{\mathsf{O}}_{\mathsf{4}}$