13765-03-2Relevant articles and documents
Dielectric characterization and ionic conductivity of α-LiIO3 crystals related to the growth conditions
Mugnier,Galez,Crettez,Bourson,Bouillot
, p. 619 - 623 (2000)
The dielectric response of α-LiIO3 has been studied at room temperature between 20 Hz and 1 MHz with various types of electrodes and compared to the results in the literature. By changing the sample thickness, a relaxation of space charges is clearly identified and the bulk ionic conductivity is deduced from the admittance diagram. Finally a comparison is carried out between chromium doped and undoped crystals obtained from acid and neutral growth solutions.
Electrical conductivity of α-LiIO3 acid type crystals at 1 kHz
Ke, San-huang,Wang, Ren-zhi,Huang, Mei-chun
, p. 1013 - 1018 (2008/10/08)
The temperature dependence of the electrical conductivity of α-LiIO3 acid type crystals is studied. By applying a very low amplitude electric field at 1 kHz and performing a continuous sampling of measurements, differences, reproducible for all the investigated samples, appeared between the first and subsequent heatings The anomalies occurring during the first heating are attributed mainly to inclusions of mother liquor, HIO3 and Li1-xHxIO3. The 'intrinsic' conductivity is measured after a first annealing at about 470 K; the activation energies are then calculated.
OXIDATION OF ALKALI METAL IODATES IN MOLTEN ALKALI METAL NITRATES
Dratovsky, M.,Dvorakova, E.,Rytir, Z.
, p. 175 - 182 (2007/10/02)
Alkali metal iodates MIO3 (M=Li, Na, K) were oxidized in the presence of hydroxides MOH in molten nitrates MNO3 with oxygen or ozone.The following products were precipitated at variable MOH:MIO3 rations and then separated from the melts and identified after purification with liquid ammonia: Li5IO6, Na4IO5, Na5IO6, K2IO4, K3IO5.Two of these substances, Na4IO5 and K2IO4 contain formally hexavalent iodine and were studied by X-ray powder method, IR spectroscopy and measurements of the magnetic susceptibility.Their thermodynamic stability was also investigated.Periodates Na5IO6 and K3IO5 have been pepared for the first time from a homoge neous mixture by precipitation with an oxidizing agent.