Structure of potassium sulfate tellurate: Te(OH)₆

Structural, conductivity and dielectric studies in (NH4)2SeO4·Te(OH)6

“…The structure of the alkali sulfate tellurate, M 2 SO 4 ·Te(OH) 6 where M = K, Na, Rb, Cs, NH 4 and Tl has been studied [1][2][3][4][5]. M 2 SeO 4 ·Te(OH) 6 where M = K, Cs and Rb have also been analyzed.…”

Structural, dielectric and vibrational studies in the dipotassium sulfate selenate tellurate mixed solid solution

“…The dielectric studies show that the material exhibit a ferroelectric-paraelectric phase transition at 433 K and a superionic protonic conduction one at 480 K [2]. On the other hand, the potassium sulfate tellurate K 2 SO 4 ·Te(OH) 6 (KSTe) crystallizes in the centrosymmetric triclinic space group and presents a ferroelectric-paraelectric phase transition at 460 K and a ionic protonic conduction phase at 490 K [3,4].…”

“…The compounds of general formula M 2 XO 4 ·Te(OH) 6 (M = Na + , K + , NH 4 + , Rb + , Cs + and X = S, Se, P) undergo structural phase transitions and interesting physical properties such as superprotonic conduction and ferroelectricity [1][2][3][4].…”

Neutron structural and vibrational studies of dipotassium selenate tellurate

“…In the KSeTe structure, the Te atom, located in a center of symmetry, has an octahedral coordination formed by six oxygen atoms. In consequence, the obtained Te O distances in the Te(OH) 6 Differently to the potassium sulphate tellurate where the environment of the K cation is octahedral [4], the K + cation in the potassium selenate tellurate structure is coordinated by only five oxygen atoms. In fact every cation is coordinated by two oxygen atoms belonging to a SeO 4 tetrahedra and three oxygen atoms to a Te(OH) 6 octahedra.…”

“…The structure of (NH 4 ) 2 SO 4 ·Te(OH) 6 is monoclinic with Cc space group, whereas the structure of the potassium sulphate tellurate K 2 SO 4 ·Te(OH) 6 is centrosymmetric triclinic [3,4]. On the other hand, some structures of alkalin selenate tellurate are studied.…”