High-Pressure Reactions of Oxometallates - 3. High-Pressure, High-Temperature Decomposition of KVO3.

Article abstract of DOI:10.1016/0025-5408(83)90168-X

The high-pressure, high-temperature behavior of KVO//3 was investigated in a modified belt-type apparatus at different pressures (3-40 kbar), temperatures (500-1100 degree C), using reducing (BN, graphite) or inert (Cu, Ag, Au) capsule materials. Hollandites K//2// minus //xV//8O//1//6, modified Hollandites K//2// minus //xV//8// plus //2//xO//1//6// plus //x, and V//2O//3 were synthesized as quenchable, crystalline materials. A sequence of reactions is proposed for the high-pressure decomposition of KVO//3 in inert capsules which involves the formation of potassium peroxoanadates.