High-purity samples of potassium trifluoroargentate(II), KAgF3, have been obtained via a novel synthetic pathway. This compound is found to exhibit an order–disorder phase transition around 230 K. Susceptibility measurements indicate that KAgF3 exhibits strong antiferromagnetic (AFM) coupling reminiscent of that found in copper(II) oxides.
Disproportionation of Ag(II) to Ag(I) and Ag(III) in Fluoride Systems and Syntheses and Structures of (AgF<sup>+</sup>)<sub>2</sub>AgF<sub>4</sub><sup>-</sup>MF<sub>6</sub><sup>-</sup> Salts (M = As, Sb, Pt, Au, Ru)
作者:Ciping Shen、Boris Žemva、George M. Lucier、Oliver Graudejus、John A. Allman、Neil Bartlett
DOI:10.1021/ic9905603
日期:1999.10.1
Interaction of Ag(+) salts in anhydrous liquid hydrogen fluoride, aHF, with AgF(4)(-) salts gives amorphous red-brown diamagnetic Ag(I)Ag(III)F(4), which transforms exothermally to brown, paramagnetic, microcrystalline Ag(II)F(2) below 0 degrees C. Ag(I)Au(III)F(4) prepared from Ag(+) and AuF(4)(-) in aHF has a tetragonal unit cell and a KBrF(4) type lattice, with a = 5.788(1) Å, c = 10.806(2) Å, and
Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine
作者:T Nakajima、M Koh、V Gupta、B Žemva、K Lutar
DOI:10.1016/s0013-4686(99)00389-8
日期:2000.1
Highly fluorinated graphites have been synthesized by using elemental fluorine under pressure and high oxidation state complex fluoride, K2NiF6 or KAgF4 in anhydroushydrogenfluoride. Their electrochemical discharge as a cathode of primary lithium battery has been investigated in organic electrolyte solution. Main products were stage 1 compounds or the stage 1 involving stage 2 and 3 phases as minor
通过在压力下使用元素氟和无水氟化氢中的高氧化态络合物氟化物K 2 NiF 6或KAgF 4合成了高度氟化的石墨。在有机电解质溶液中,已经研究了它们作为一次锂电池阴极的电化学放电。主要产品是阶段1化合物或涉及阶段2和3的阶段1作为次要成分,其组成约为C 1.6F。X射线光电子能谱表明存在几乎半离子的C-F键。电化学研究表明,使用KAgF 4制备的C x F样品相对于Li / Li +,元素氟表现出3.2 V的高而平坦的放电电位,在截止电位1.5 V时的放电容量为〜500 mA hg -1。
Hoppe, R., Recueil des Travaux Chimiques des Pays-Bas, 1956, vol. 75, p. 569 - 575
作者:Hoppe, R.
DOI:——
日期:——
Klemm, W., Angewandte Chemie, 1954, vol. 66, p. 468 - 474