A new 'old' sodium boride: Linked pentagonal bipyramids and octahedra in Na3B20

Angewandte Chemie - International Edition

Volumn 37, Issue 8, 1998, Pages 1117-1118

  Albert, Barbara ^a  

^a UNIVERSITY OF BONN   (Germany)

Author keywords

Boron; Sodium; Structure elucidation; X ray powder diffractometry

Indexed keywords

EID: 0032482061     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(19980504)37:8<1117::AID-ANIE1117>3.0.CO;2-X     Document Type: Article

References (17)

1. a) G. Mair, R. Nesper, H. G. von Schnering, Mater. Sci. Monogr. (React Solids, Part B) 1985, 28B, 861-862;
2. b) G. Mair, R. Nesper, H. G. von Schnering, J. Solid State Chem. 1988, 75, 30-40;
3. c) Nesper and Wörle recently described two other lithium bondes: M. Wörle, Dissertation, ETH Zürich, 1995.
4. R. Naslain, J. Étourneau, C. R. Acad. Sci. Ser. C 1966, 263(6), 484-487.
5. P. Hagenmüller, R. Naslain, C. R. Acad. Sci. 1963, 257, 1294-1296.
6. R. Naslain, J. S. Kasper, J. Solid State Chem. 1970, 1, 150-151.
7. M. von Stackelberg, F. Neumann, Z. Phys. Chem. B 1932, 19, 314-320.
8. Elemental analysis: Na 24.6 (by flame photometry), B 73.2 (tirimetric; boron is lost on dissolution in acid); calcd: Na 24.2, B 75.8. The absence of elements with atomic numbers higher than 11 was shown by EDX. The carbon and nitrogen content of the samples was less than 1 % (Labor Pascher, Remagen).
9. 6 (PDF 34-0991).
10. -5 mbar, step width 0.004°, measurement range θ = 3-50°.
11. P. E. Werner, Program TREOR90, Stockholm, Sweden, 1990
12. 20 have been proven to be independent of the crystallographic description and are unambiguous.
13. A. C. Larson, R. B. Von Dreele, Program GSAS, Los Alamos, USA, 1985.
14. -3. Further details of the crystal structure investigations may be obtained from the Fachinformationszentrum Karlsruhe, D-76344 Eggenstein-Leopoldshafen, Germany (fax: (+49)7247-808-666: e-mail: crysdata@fiz-karlsruhe.de), on quoting the depository number CSD-407159.
15. R. Hundt, Program KPLOT, Bonn, Germany, 1979.
16. The coordination environment of one of the Na atoms can be described as a distorted cuboctahedron (coordination number 24): the second Na atom is coordinated by 20 B atoms.
17. B. Albert, K. Hofmann, unpublished results.