Berkelium (III) bromide
Crystal structure | |||||||
---|---|---|---|---|---|---|---|
__ Bk 3+ __ Br - | |||||||
Crystal system | |||||||
Space group |
Cmcm (No. 63) |
||||||
Lattice parameters |
a = 403 pm |
||||||
General | |||||||
Surname | Berkelium (III) bromide | ||||||
other names |
Berkelium tribromide |
||||||
Ratio formula | BkBr 3 | ||||||
Brief description |
yellow-green crystals |
||||||
External identifiers / databases | |||||||
|
|||||||
properties | |||||||
Molar mass | 486.78 g mol −1 | ||||||
Physical state |
firmly |
||||||
Hazard and safety information | |||||||
Radioactive |
|||||||
|
|||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Berkelium (III) bromide is a bromide of the artificial element and actinoid Berkelium with the empirical formula BkBr 3 . In this salt , Berkelium occurs in the +3 oxidation state.
properties
Berkelium (III) bromide crystallizes in the PuBr 3 type at low temperatures , the crystal system is orthorhombic with a = 403 pm, b = 1271 pm and c = 912 pm. At higher temperatures it crystallizes in the AlCl 3 type , the crystal system is monoclinic with a = 723 pm, b = 1253 pm, c = 683 pm and β = 110.6 °.
safety instructions
Classifications according to the CLP regulation are not available because they only include chemical hazard and play a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.
Individual evidence
- ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1969.
- ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
- ^ A b John H. Burns, JR Peterson, JN Stevenson: Crystallographic Studies of some Transuranic Trihalides: 239 PuCl 3 , 244 CmBr 3 , 249 BkBr 3 and 249 CfBr 3 , in: J. Inorg. Nucl. Chem. , 1975 , 37 (3), pp. 743-749 ( doi : 10.1016 / 0022-1902 (75) 80532-X ).
- ↑ JP Young, RG Haire, JR Peterson, DD Ensor, RL Fellows: Chemical Consequences of Radioactive Decay. 1. Study of 249 Cf Ingrowth into Crystalline 249 BkBr 3 : A New Crystalline Phase of CfBr 3 , in: Inorg. Chem. , 1980 , 19 (8), pp. 2209-2212 ( doi : 10.1021 / ic50210a003 ).
- ^ D. Cohen, S. Fried, S. Siegel, B. Tani: The preparation and crystal structure of some berkelium compounds , in: Inorg. Nucl. Chem. Lett. , 1968 , 4 (5), pp. 257-260 ( doi : 10.1016 / 0020-1650 (68) 80125-4 ).
- ↑ JR Peterson, DE Hobart: The Chemistry of Berkelium , in: Harry Julius Emeleus (Ed.): Advances in Inorganic Chemistry and Radiochemistry , Volume 28, Academic Press, 1984, ISBN 0-12023628-1 , pp. 29-64 ( doi : 10.1016 / S0898-8838 (08) 60204-4 ), here: pp. 52–53 ( limited preview in the Google book search.
literature
- David E. Hobart, Joseph R. Peterson: Berkelium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (Eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 1444-1498 ( doi : 10.1007 / 1-4020-3598-5_10 ).