User:Praseodymium-141/Actinium compounds
Actinium compounds are compounds containing the element
Properties of actinium compounds
Formula | color | symmetry | space group | No | Pearson symbol | a (pm) | b (pm) | c (pm) | Z | density, g/cm3 |
---|---|---|---|---|---|---|---|---|---|---|
Ac | silvery | fcc[3] | Fm3m | 225 | cF4 | 531.1 | 531.1 | 531.1 | 4 | 10.07 |
AcH2 | unknown | cubic[3] | Fm3m | 225 | cF12 | 567 | 567 | 567 | 4 | 8.35 |
Ac2O3 | white[4] | trigonal[5]
|
P3m1 | 164 | hP5 | 408 | 408 | 630 | 1 | 9.18 |
Ac2S3 | black | cubic[6] | I43d | 220 | cI28 | 778.56 | 778.56 | 778.56 | 4 | 6.71 |
AcF3 | white[7] | P3c1 | 165 | hP24 | 741 | 741 | 755 | 6 | 7.88 | |
AcCl3 | white | hexagonal[2][8] | P63/m | 165 | hP8 | 764 | 764 | 456 | 2 | 4.8 |
AcBr3 | white[2] | hexagonal[8] | P63/m | 165 | hP8 | 764 | 764 | 456 | 2 | 5.85 |
AcOF | white[9] | cubic[2] | Fm3m | 593.1 | 8.28 | |||||
AcOCl | white | tetragonal[2] | 424 | 424 | 707 | 7.23 | ||||
AcOBr | white | tetragonal[2] | 427 | 427 | 740 | 7.89 | ||||
AcPO4·0.5H2O | unknown | hexagonal[2] | 721 | 721 | 664 | 5.48 |
Here a, b and c are lattice constants, No is space group number and Z is the number of formula units per unit cell. Density was not measured directly but calculated from the lattice parameters.
Oxides
Halides
- AcF3 + 2 NH3 + H2O → AcOF + 2 NH4F
Actinium trichloride is obtained by reacting actinium hydroxide or
Reaction of aluminium bromide and actinium oxide yields actinium tribromide:
- Ac2O3 + 2 AlBr3 → 2 AcBr3 + Al2O3
and treating it with ammonium hydroxide at 500 °C results in the oxybromide AcOBr.[2]
Other compounds
Actinium hydride was obtained by reduction of actinium trichloride with potassium at 300 °C, and its structure was deduced by analogy with the corresponding LaH2 hydride. The source of hydrogen in the reaction was uncertain.[11]
Mixing
See also
References
Category:Actinium compounds Category:Actinium Category:Chemical compounds by element