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Chemical compound From Wikipedia, the free encyclopedia
Promethium(III) hydroxide is an inorganic compound with a chemical formula Pm(OH)3. It is a radioactive compound.
Identifiers | |
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3D model (JSmol) |
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Properties | |
Pm(OH)3 | |
Appearance | purplish-pink solid |
Density | 5.1 g/cm3 |
Structure | |
hexagonal | |
a = 6.39 Å, c = 3.68 Å | |
Related compounds | |
Other anions |
promethium oxide |
Other cations |
neodymium(III) hydroxide samarium(III) hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Promethium(III) hydroxide can be produced by reacting ammonia water with a solution of a promethium(III) salt, from which promethium(III) hydroxide precipitates as a purplish-pink amorphous solid. By heating with water, it can be forced to crystallize, giving hexagonal crystals isomorphous with other rare earth hydroxides:[1]
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