Crystal Structure and Thermal Behaviour of Er 2 (SeO 4 ) 3 · 8H 2 O
Single crystals of Er 2 (SeO 4 ) 3 ・ 8H 2 O were obtained by dissolving Er 2 O 3 in selenic acid. The selenate crystallizes in the monoclinic space group C2/c (Z = 4, a = 1372.8(2), b = 687.51(7), c = 1860.2(3) pm, β = 101.85(2)◦, R all = 0.0518) and contains the Er 3+ ions in eightfold coordination...
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| Veröffentlicht in: | Zeitschrift für Naturforschung. B, A journal of chemical sciences A journal of chemical sciences, 2004-09, Vol.59 (9), p.958-962 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Single crystals of Er
2
(SeO
4
)
3
・ 8H
2
O were obtained by dissolving Er
2
O
3
in selenic acid. The selenate crystallizes in the monoclinic space group C2/c (Z = 4, a = 1372.8(2), b = 687.51(7), c = 1860.2(3) pm, β = 101.85(2)◦, R
all
= 0.0518) and contains the Er
3+
ions in eightfold coordination of oxygen atoms that belong to two crystallographically different SeO
4
2−
ions and to four H
2
O molecules. According to DTA/TG measurements and temperature dependent powder diffraction data, Er
2
(SeO
4
)
3
・8H
2
O decomposes in several steps yielding finally Er
2
O
3
. Er
2
(SeO
4
)
3
and Er
2
(SeO
3
)
3
could be identified as intermediates, and for Er
2
(SeO
4
)
3
a phase transition was detected. |
|---|---|
| ISSN: | 0932-0776 1865-7117 |
| DOI: | 10.1515/znb-2004-0902 |