Difference between revisions of "Berkelium(III) fluoride"
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| Section4 = {{Chembox Structure | | Section4 = {{Chembox Structure | ||
| Reference =  (β-phase)<ref name="Peterson"/> | | Reference =  (β-phase)<ref name="Peterson"/> | ||
| − | | CrystalStruct = [[ | + | | CrystalStruct = [[Lanthanum trifluoride structure|LaF<sub>3</sub>]], [[Pearson symbol|hP6]] |
| − | | SpaceGroup = | + | | SpaceGroup = P{{overline|3}}''c''1 (No. 165) |
| LattConst_a = 697 pm | | LattConst_a = 697 pm | ||
| LattConst_c = 714 pm | | LattConst_c = 714 pm | ||
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| OtherAnions = [[Berkelium(III) chloride]]<br/>[[Berkelium(III) bromide]]<br/>[[Berkelium(III) iodide]] | | OtherAnions = [[Berkelium(III) chloride]]<br/>[[Berkelium(III) bromide]]<br/>[[Berkelium(III) iodide]] | ||
| OtherCations = [[Terbium(III) fluoride]] | | OtherCations = [[Terbium(III) fluoride]] | ||
| + | | OtherCpds = [[Berkelium(IV) fluoride]] | ||
}} | }} | ||
}} | }} | ||
| − | '''Berkelium(III) fluoride''', BkF<sub>3</sub>, is the lower [[fluoride]] of [[berkelium]]. It is prepared by the reaction of hydrofluoric acid with [[Berkelium(IV) oxide|BkO<sub>2</sub>]] or [[Berkelium(III) oxide|Bk<sub>2</sub>O<sub>3</sub>]].<ref name="H&P">{{citation | first1 = David E. | last1 = Hobart | first2 = Joseph R. | last2 = Peterson | contribution = Berkelium | title = The Chemistry of the Actinide and Transactinide Elements | editor1-first = Lester R. | editor1-last = Morss | editor2-first = Norman M. | editor2-last = Edelstein | editor3-first = Jean | editor3-last = Fuger | edition = 3rd | year = 2006 | volume = 3 | publisher = Springer | location = Dordrecht, the Netherlands | chapter = 10 | pages = 1444–98 | url = http://radchem.nevada.edu/classes/rdch710/files/berkelium.pdf | doi = 10.1007/1-4020-3598-5_10}}.</ref> It is the first [[actinoid]] trifluoride that exhibits the YF<sub>3</sub>-type orthorhombic structure as the room-temperature α-phase and the LaF<sub>3</sub>-type trigonal structure as the high-temperature β-phase.<ref name="Peterson"/><ref>{{citation | last1 = Ensor | first1 = D. D. | last2 = Peterson | first2 = J. R. | last3 = Haire | first3 = R. G. | last4 = Young | first4 = J. P. | year = 1981 | title = Absorption spectrophotometric study of berkelium(III) and (IV) fluorides in the solid state | journal = J. Inorg. Nucl. Chem. | volume = 43 | issue = 5 | pages = 1001–3 | doi = 10.1016/0022-1902(81)80164-9}}.</ref> | + | '''Berkelium(III) fluoride''', BkF<sub>3</sub>, is the lower [[fluoride]] of [[berkelium]]. It is prepared by the reaction of hydrofluoric acid with [[Berkelium(IV) oxide|BkO<sub>2</sub>]] or [[Berkelium(III) oxide|Bk<sub>2</sub>O<sub>3</sub>]].<ref name="H&P">{{citation | first1 = David E. | last1 = Hobart | first2 = Joseph R. | last2 = Peterson | contribution = Berkelium | title = The Chemistry of the Actinide and Transactinide Elements | editor1-first = Lester R. | editor1-last = Morss | editor2-first = Norman M. | editor2-last = Edelstein | editor3-first = Jean | editor3-last = Fuger | edition = 3rd | year = 2006 | volume = 3 | publisher = Springer | location = Dordrecht, the Netherlands | chapter = 10 | pages = 1444–98 | url = http://radchem.nevada.edu/classes/rdch710/files/berkelium.pdf | doi = 10.1007/1-4020-3598-5_10}}.</ref> It is the first [[actinoid]] trifluoride that exhibits the [[Yttrium trifluoride structure|YF<sub>3</sub>-type]] [[orthorhombic]] structure as the room-temperature α-phase and the [[Lanthanum trifluoride structure|LaF<sub>3</sub>-type]] [[trigonal]] structure as the high-temperature β-phase: the transition temperature between the two phases is 350–600 °C.<ref name="Peterson"/><ref>{{citation | last1 = Ensor | first1 = D. D. | last2 = Peterson | first2 = J. R. | last3 = Haire | first3 = R. G. | last4 = Young | first4 = J. P. | year = 1981 | title = Absorption spectrophotometric study of berkelium(III) and (IV) fluorides in the solid state | journal = J. Inorg. Nucl. Chem. | volume = 43 | issue = 5 | pages = 1001–3 | doi = 10.1016/0022-1902(81)80164-9}}.</ref> |
==References== | ==References== | ||
Latest revision as of 13:35, 30 September 2010
| Berkelium(III) fluoride | |
|---|---|
| Other names | Berkelium trifluoride |
| Identifiers | |
| InChI | InChI=1/Bk.3FH/h;3*1H/q+3;;;/p-3 |
| InChIKey | LHPZAGRUAMLUHA-BQXGXEPKEE |
| Standard InChI | InChI=1S/Bk.3FH/h;3*1H/p-3/i1+2;;; |
| Standard InChIKey | LHPZAGRUAMLUHA-LVGFSJROSA-K |
| CAS number | [] |
| ChemSpider | |
| Properties[1] | |
| Chemical formula | BkF3 |
| Molar mass | 306.07 g mol−1 |
| Appearance | yellow-green solid |
| Density | 9.70 g cm−3 |
| Structure (α-phase)[1] | |
| Crystal structure | YF3, oP16 |
| Space group | Pnma (No. 62) |
| Lattice constant | a = 670 pm, b = 709 pm, c = 441 pm |
| Structure (β-phase)[1] | |
| Crystal structure | LaF3, hP6 |
| Space group | P3c1 (No. 165) |
| Lattice constant | a = 697 pm, c = 714 pm |
| Related compounds | |
| Other anions | Berkelium(III) chloride Berkelium(III) bromide Berkelium(III) iodide |
| Other cations | Terbium(III) fluoride |
| Other compounds | Berkelium(IV) fluoride |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Berkelium(III) fluoride, BkF3, is the lower fluoride of berkelium. It is prepared by the reaction of hydrofluoric acid with BkO2 or Bk2O3.[2] It is the first actinoid trifluoride that exhibits the YF3-type orthorhombic structure as the room-temperature α-phase and the LaF3-type trigonal structure as the high-temperature β-phase: the transition temperature between the two phases is 350–600 °C.[1][3]
References
- ↑ 1.0 1.1 1.2 1.3 Peterson, J. R.; Cunningham, B. B. Crystal structures and lattice parameters of the compounds of berkelium—IV. berkelium trifluoride. J. Inorg. Nucl. Chem. 1968, 30 (7), 1775–84. DOI: 10.1016/0022-1902(68)80353-7.
- ↑ Hobart, David E.; Peterson, Joseph R. Berkelium. In The Chemistry of the Actinide and Transactinide Elements, 3rd ed.; Morss, Lester R.; Edelstein, Norman M.; Fuger, Jean, Eds.; Springer: Dordrecht, the Netherlands, 2006; Vol. 3, Chapter 10, pp 1444–98. doi:10.1007/1-4020-3598-5_10, <http://radchem.nevada.edu/classes/rdch710/files/berkelium.pdf>.
- ↑ Ensor, D. D.; Peterson, J. R.; Haire, R. G.; Young, J. P. Absorption spectrophotometric study of berkelium(III) and (IV) fluorides in the solid state. J. Inorg. Nucl. Chem. 1981, 43 (5), 1001–3. DOI: 10.1016/0022-1902(81)80164-9.
External links
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