The United States did not pay Russia in the year 1818. However, the U.S. paid Russia $7.2 million in 1867 for the purchase of Alaska, known as the Alaska Purchase. This payment was made in gold and covered the transfer of the territory from Russia to the U.S. The treaty for this purchase was signed on March 30, 1867, and the payment was made within ten months of the exchange of ratifications.
If the question pertains to payments or financial interactions between the United States and Russia in the year 1818 specifically, there is no relevant information indicating any such payment during that year. Let me know if clarification or information on a different year or context is needed.
