Chemical composition and structure of Venusian clouds determined from results of roentgenoradiometric experiments carried out by landing modules of Vega-1 and Vega-2 automatic interplanetary stations

In the range of measurements made with the roentgenometric apparatus on the Vega 1 and 2, the cloud aerosol in the altitude range 62 to 51.5 km consists for the most part of components containing sulfur and chlorine. The altitude range 51.5 to 47 km is the region of occurrence of aerosol containing phosphorus and sulfur. The Venusian atmosphere may contain phosphorus oxides which are the products of hypergenesis and possibly volcanic activity. The active participation of phosphorus oxides in redox processes forms the profile water vapor, carbon monoxide and atmospheric components containing sulfur.