Dipotassium heptafluorotantalate(V), &#946-K2TaF7, at 509 K
Artikel i vetenskaplig tidskrift, 2006

Upon heating to 509 K, monoclinic α-K2TaF7 (P21/c) transforms to orthorhombic β-K2TaF7 (Pnma) which is composed of discrete K+ cations and TaF72- anions. In the anion, the Ta atom is sevenfold coordinated by F atoms, with the Ta-F distance varying from 1.88(2) to 1.965(19) Å. The two independent K+ cations are surrounded by F atoms positioned within 2.740(17)-2.979(10) and 2.989(17)-3.15(5) Å. Ta, both K and one of the four F atoms are located on a mirror plane, Wyckoff position 4c.

phase transition

X-ray structure


Vratislav Langer

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Lubomír Smrcok

Miroslav Boca

Acta Crystallographica Section E: Structure Reports Online

1600-5368 (ISSN)

Vol. E62 i91-i93


Oorganisk kemi