Abstract:

The phase composition of a К2O – SrO – V2O5 – V2O3 system fragment at 9000С in sealed evacuated quartz ampoules with a residual air pressure of 0.001 mm was investigated. 0.001 mm Hg. Based on the X-ray phase analysis of sintering products, it was concluded that there are three new phases: KSr5V6O15, K3+xSr3-xV6O15, K1+xSrV6x+4O12x+8 (0 ≤ x ≤ 1). The last two phases at temperatures below ~ 77 K are attracted by a magnet. Built phase diagram. The radiographic characteristics of the new compounds are given.

Keywords: vanadite potassium - strontium., K1 + xSrV6x + 4O12x + 8, K3 + xSr3-xV6O15, KSr5V6O15, KSrV4O8, KSrV2O5, K2O - SrO - V2O5 - V2O3 system