Difference between revisions of "Actinium"
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Ac; emanium; aktinium (Ces., Sven.); Actinium (Dan., Deut., Fr., Ned., Nor.); actinio (Esp.); attinio (It.); (Ned.); aktyn (Pol.); actínio (Port.) | Ac; emanium; aktinium (Ces., Sven.); Actinium (Dan., Deut., Fr., Ned., Nor.); actinio (Esp.); attinio (It.); (Ned.); aktyn (Pol.); actínio (Port.) | ||
| − | == | + | == Risks == |
| + | |||
| + | * Extremely hazardous. | ||
| + | * Radioactive bone-seeking poison. | ||
| + | * Akzo Nobel: [https://www.powder-online.com/datasheets/msds/8007977_GB_EN.pdf SDS] | ||
| + | |||
| + | == Physical and Chemical Properties == | ||
Reacts with water to produce hydrogen gas. | Reacts with water to produce hydrogen gas. | ||
| Line 20: | Line 26: | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 1050 | + | | 1050 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 10.07 | + | | 10.07 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| atomic wt=227 | | atomic wt=227 | ||
| − | |- | + | |-C |
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | about 3300 | + | | about 3300 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | |||
| − | |||
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 649 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 649 | ||
Latest revision as of 11:26, 24 April 2022
Description
A naturally occurring, radioactive element found in uranium ores. Actinium has a half-life of 21.77 years. Metallic actinium is silvery white and produces a faint blue glow which is visible in the dark. Actinium was first isolated and named in 1899 by André Debierne; in 1902, it was independently discovered by Friedrich Giesel and named emanium. The two elements were reconciled as one in 1904. Actinium is a highly reactive material with a strong basic character that produces water-insoluble salts with most anions. It is very difficult to extract and separate from uranium ores and has limited commercial applications.
Synonyms and Related Terms
Ac; emanium; aktinium (Ces., Sven.); Actinium (Dan., Deut., Fr., Ned., Nor.); actinio (Esp.); attinio (It.); (Ned.); aktyn (Pol.); actínio (Port.)
Risks
- Extremely hazardous.
- Radioactive bone-seeking poison.
- Akzo Nobel: SDS
Physical and Chemical Properties
Reacts with water to produce hydrogen gas.
| Composition | Ac (atomic no. 89) |
|---|---|
| CAS | 7440-34-8 |
| Melting Point | 1050 C |
| Density | 10.07 g/ml |
| Molecular Weight | atomic wt=227 |
| Boiling Point | about 3300 C |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 649
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- Chemical & Engineering News, American Chemical Society, Washington DC, 81 (36) , Sept. 8, 2003 Comment: "Actinium" by Greg Wall, p. 162